Omit '= null' as default value in generated dart:html code.

lib/dom/frog/dom_frog.dart

 #library('dom');
 
 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // DO NOT EDIT
 // Auto-generated Dart DOM library.
 
 
 
 
 // TODO(sra): What 'window' do we get in a worker?  Perhaps this
 // should return the interface type.
 DOMWindow get window() native "return window;";
 
 HTMLDocument get document() native "return document;";
 
 // TODO(vsm): Implement these.
 interface LayoutTestController {}
 LayoutTestController layoutTestController;
 
 spawnDomIsolate(Window targetWindow, String entryPoint) {
   throw const NotImplementedException();
 }
 
 class _AbstractWorkerJs extends _EventTargetJs implements AbstractWorker native "*AbstractWorker" {
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _ArrayBufferJs extends _DOMTypeJs implements ArrayBuffer native "*ArrayBuffer" {
 
   final int byteLength;
 
-  _ArrayBufferJs slice(int begin, [int end = null]) native;
+  _ArrayBufferJs slice(int begin, [int end]) native;
 }
 
 class _ArrayBufferViewJs extends _DOMTypeJs implements ArrayBufferView native "*ArrayBufferView" {
 
   final _ArrayBufferJs buffer;
 
   final int byteLength;
 
   final int byteOffset;
 }
@@ skipping 70 matching lines @@
   final _AudioDestinationNodeJs destination;
 
   final _AudioListenerJs listener;
 
   final num sampleRate;
 
   _RealtimeAnalyserNodeJs createAnalyser() native;
 
   _BiquadFilterNodeJs createBiquadFilter() native;
 
-  _AudioBufferJs createBuffer(buffer_OR_numberOfChannels, mixToMono_OR_numberOfFrames, [num sampleRate = null]) native;
+  _AudioBufferJs createBuffer(buffer_OR_numberOfChannels, mixToMono_OR_numberOfFrames, [num sampleRate]) native;
 
   _AudioBufferSourceNodeJs createBufferSource() native;
 
-  _AudioChannelMergerJs createChannelMerger([int numberOfInputs = null]) native;
+  _AudioChannelMergerJs createChannelMerger([int numberOfInputs]) native;
 
-  _AudioChannelSplitterJs createChannelSplitter([int numberOfOutputs = null]) native;
+  _AudioChannelSplitterJs createChannelSplitter([int numberOfOutputs]) native;
 
   _ConvolverNodeJs createConvolver() native;
 
-  _DelayNodeJs createDelayNode([num maxDelayTime = null]) native;
+  _DelayNodeJs createDelayNode([num maxDelayTime]) native;
 
   _DynamicsCompressorNodeJs createDynamicsCompressor() native;
 
   _AudioGainNodeJs createGainNode() native;
 
-  _JavaScriptAudioNodeJs createJavaScriptNode(int bufferSize, [int numberOfInputChannels = null, int numberOfOutputChannels = null]) native;
+  _JavaScriptAudioNodeJs createJavaScriptNode(int bufferSize, [int numberOfInputChannels, int numberOfOutputChannels]) native;
 
   _MediaElementAudioSourceNodeJs createMediaElementSource(_HTMLMediaElementJs mediaElement) native;
 
   _OscillatorJs createOscillator() native;
 
   _AudioPannerNodeJs createPanner() native;
 
   _WaveShaperNodeJs createWaveShaper() native;
 
   _WaveTableJs createWaveTable(_Float32ArrayJs real, _Float32ArrayJs imag) native;
 
-  void decodeAudioData(_ArrayBufferJs audioData, AudioBufferCallback successCallback, [AudioBufferCallback errorCallback = null]) native;
+  void decodeAudioData(_ArrayBufferJs audioData, AudioBufferCallback successCallback, [AudioBufferCallback errorCallback]) native;
 
   void startRendering() native;
 }
 
 class _AudioDestinationNodeJs extends _AudioNodeJs implements AudioDestinationNode native "*AudioDestinationNode" {
 
   final int numberOfChannels;
 }
 
 class _AudioGainJs extends _AudioParamJs implements AudioGain native "*AudioGain" {
@@ skipping 18 matching lines @@
 }
 
 class _AudioNodeJs extends _DOMTypeJs implements AudioNode native "*AudioNode" {
 
   final _AudioContextJs context;
 
   final int numberOfInputs;
 
   final int numberOfOutputs;
 
-  void connect(destination, int output, [int input = null]) native;
+  void connect(destination, int output, [int input]) native;
 
   void disconnect(int output) native;
 }
 
 class _AudioPannerNodeJs extends _AudioNodeJs implements AudioPannerNode native "*AudioPannerNode" {
 
   static final int EQUALPOWER = 0;
 
   static final int EXPONENTIAL_DISTANCE = 2;
 
@@ skipping 77 matching lines @@
 class _BatteryManagerJs extends _EventTargetJs implements BatteryManager native "*BatteryManager" {
 
   final bool charging;
 
   final num chargingTime;
 
   final num dischargingTime;
 
   final num level;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _BeforeLoadEventJs extends _EventJs implements BeforeLoadEvent native "*BeforeLoadEvent" {
 
   final String url;
 }
 
 class _BiquadFilterNodeJs extends _AudioNodeJs implements BiquadFilterNode native "*BiquadFilterNode" {
 
   static final int ALLPASS = 7;
@@ skipping 22 matching lines @@
 
   void getFrequencyResponse(_Float32ArrayJs frequencyHz, _Float32ArrayJs magResponse, _Float32ArrayJs phaseResponse) native;
 }
 
 class _BlobJs extends _DOMTypeJs implements Blob native "*Blob" {
 
   final int size;
 
   final String type;
 
-  _BlobJs slice([int start = null, int end = null, String contentType = null]) native;
+  _BlobJs slice([int start, int end, String contentType]) native;
 
-  _BlobJs webkitSlice([int start = null, int end = null, String contentType = null]) native;
+  _BlobJs webkitSlice([int start, int end, String contentType]) native;
 }
 
 class _CDATASectionJs extends _TextJs implements CDATASection native "*CDATASection" {
 }
 
 class _CSSCharsetRuleJs extends _CSSRuleJs implements CSSCharsetRule native "*CSSCharsetRule" {
 
   String encoding;
 }
 
@@ skipping 157 matching lines @@
   String getPropertyShorthand(String propertyName) native;
 
   String getPropertyValue(String propertyName) native;
 
   bool isPropertyImplicit(String propertyName) native;
 
   String item(int index) native;
 
   String removeProperty(String propertyName) native;
 
-  void setProperty(String propertyName, String value, [String priority = null]) native;
+  void setProperty(String propertyName, String value, [String priority]) native;
 }
 
 class _CSSStyleRuleJs extends _CSSRuleJs implements CSSStyleRule native "*CSSStyleRule" {
 
   String selectorText;
 
   final _CSSStyleDeclarationJs style;
 }
 
 class _CSSStyleSheetJs extends _StyleSheetJs implements CSSStyleSheet native "*CSSStyleSheet" {
 
   final _CSSRuleListJs cssRules;
 
   final _CSSRuleJs ownerRule;
 
   final _CSSRuleListJs rules;
 
-  int addRule(String selector, String style, [int index = null]) native;
+  int addRule(String selector, String style, [int index]) native;
 
   void deleteRule(int index) native;
 
   int insertRule(String rule, int index) native;
 
   void removeRule(int index) native;
 }
 
 class _CSSUnknownRuleJs extends _CSSRuleJs implements CSSUnknownRule native "*CSSUnknownRule" {
 }
@@ skipping 82 matching lines @@
   void bezierCurveTo(num cp1x, num cp1y, num cp2x, num cp2y, num x, num y) native;
 
   void clearRect(num x, num y, num width, num height) native;
 
   void clearShadow() native;
 
   void clip() native;
 
   void closePath() native;
 
-  _ImageDataJs createImageData(imagedata_OR_sw, [num sh = null]) native;
+  _ImageDataJs createImageData(imagedata_OR_sw, [num sh]) native;
 
   _CanvasGradientJs createLinearGradient(num x0, num y0, num x1, num y1) native;
 
   _CanvasPatternJs createPattern(canvas_OR_image, String repetitionType) native;
 
   _CanvasGradientJs createRadialGradient(num x0, num y0, num r0, num x1, num y1, num r1) native;
 
-  void drawImage(canvas_OR_image_OR_video, num sx_OR_x, num sy_OR_y, [num sw_OR_width = null, num height_OR_sh = null, num dx = null, num dy = null, num dw = null, num dh = null]) native;
+  void drawImage(canvas_OR_image_OR_video, num sx_OR_x, num sy_OR_y, [num sw_OR_width, num height_OR_sh, num dx, num dy, num dw, num dh]) native;
 
-  void drawImageFromRect(_HTMLImageElementJs image, [num sx = null, num sy = null, num sw = null, num sh = null, num dx = null, num dy = null, num dw = null, num dh = null, String compositeOperation = null]) native;
+  void drawImageFromRect(_HTMLImageElementJs image, [num sx, num sy, num sw, num sh, num dx, num dy, num dw, num dh, String compositeOperation]) native;
 
   void fill() native;
 
   void fillRect(num x, num y, num width, num height) native;
 
-  void fillText(String text, num x, num y, [num maxWidth = null]) native;
+  void fillText(String text, num x, num y, [num maxWidth]) native;
 
   _ImageDataJs getImageData(num sx, num sy, num sw, num sh) native;
 
   bool isPointInPath(num x, num y) native;
 
   void lineTo(num x, num y) native;
 
   _TextMetricsJs measureText(String text) native;
 
   void moveTo(num x, num y) native;
 
-  void putImageData(_ImageDataJs imagedata, num dx, num dy, [num dirtyX = null, num dirtyY = null, num dirtyWidth = null, num dirtyHeight = null]) native;
+  void putImageData(_ImageDataJs imagedata, num dx, num dy, [num dirtyX, num dirtyY, num dirtyWidth, num dirtyHeight]) native;
 
   void quadraticCurveTo(num cpx, num cpy, num x, num y) native;
 
   void rect(num x, num y, num width, num height) native;
 
   void restore() native;
 
   void rotate(num angle) native;
 
   void save() native;
 
   void scale(num sx, num sy) native;
 
   void setAlpha(num alpha) native;
 
   void setCompositeOperation(String compositeOperation) native;
 
-  void setFillColor(c_OR_color_OR_grayLevel_OR_r, [num alpha_OR_g_OR_m = null, num b_OR_y = null, num a_OR_k = null, num a = null]) native;
+  void setFillColor(c_OR_color_OR_grayLevel_OR_r, [num alpha_OR_g_OR_m, num b_OR_y, num a_OR_k, num a]) native;
 
   void setLineCap(String cap) native;
 
   void setLineJoin(String join) native;
 
   void setLineWidth(num width) native;
 
   void setMiterLimit(num limit) native;
 
-  void setShadow(num width, num height, num blur, [c_OR_color_OR_grayLevel_OR_r = null, num alpha_OR_g_OR_m = null, num b_OR_y = null, num a_OR_k = null, num a = null]) native;
+  void setShadow(num width, num height, num blur, [c_OR_color_OR_grayLevel_OR_r, num alpha_OR_g_OR_m, num b_OR_y, num a_OR_k, num a]) native;
 
-  void setStrokeColor(c_OR_color_OR_grayLevel_OR_r, [num alpha_OR_g_OR_m = null, num b_OR_y = null, num a_OR_k = null, num a = null]) native;
+  void setStrokeColor(c_OR_color_OR_grayLevel_OR_r, [num alpha_OR_g_OR_m, num b_OR_y, num a_OR_k, num a]) native;
 
   void setTransform(num m11, num m12, num m21, num m22, num dx, num dy) native;
 
   void stroke() native;
 
-  void strokeRect(num x, num y, num width, num height, [num lineWidth = null]) native;
+  void strokeRect(num x, num y, num width, num height, [num lineWidth]) native;
 
-  void strokeText(String text, num x, num y, [num maxWidth = null]) native;
+  void strokeText(String text, num x, num y, [num maxWidth]) native;
 
   void transform(num m11, num m12, num m21, num m22, num dx, num dy) native;
 
   void translate(num tx, num ty) native;
 
   _ImageDataJs webkitGetImageDataHD(num sx, num sy, num sw, num sh) native;
 
-  void webkitPutImageDataHD(_ImageDataJs imagedata, num dx, num dy, [num dirtyX = null, num dirtyY = null, num dirtyWidth = null, num dirtyHeight = null]) native;
+  void webkitPutImageDataHD(_ImageDataJs imagedata, num dx, num dy, [num dirtyX, num dirtyY, num dirtyWidth, num dirtyHeight]) native;
 }
 
 class _CharacterDataJs extends _NodeJs implements CharacterData native "*CharacterData" {
 
   String data;
 
   final int length;
 
   void appendData(String data) native;
 
@@ skipping 33 matching lines @@
   String dropEffect;
 
   String effectAllowed;
 
   final _FileListJs files;
 
   final _DataTransferItemListJs items;
 
   final List types;
 
-  void clearData([String type = null]) native;
+  void clearData([String type]) native;
 
   String getData(String type) native;
 
   bool setData(String type, String data) native;
 
   void setDragImage(_HTMLImageElementJs image, int x, int y) native;
 }
 
 class _CloseEventJs extends _EventJs implements CloseEvent native "*CloseEvent" {
 
@@ skipping 126 matching lines @@
   static final int OBSOLETE = 5;
 
   static final int UNCACHED = 0;
 
   static final int UPDATEREADY = 4;
 
   final int status;
 
   void abort() native;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void swapCache() native;
 
   void update() native;
 }
 
 class _DOMErrorJs extends _DOMTypeJs implements DOMError native "*DOMError" {
 
   final String name;
 }
@@ skipping 434 matching lines @@
   final _StyleMediaJs styleMedia;
 
   final _BarInfoJs toolbar;
 
   final _IDBFactoryJs webkitIndexedDB;
 
   final _NotificationCenterJs webkitNotifications;
 
   final _DOMWindowJs window;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void alert(String message) native;
 
   String atob(String string) native;
 
   void blur() native;
 
   String btoa(String string) native;
 
   void captureEvents() native;
@@ skipping 17 matching lines @@
   _CSSRuleListJs getMatchedCSSRules(_ElementJs element, String pseudoElement) native;
 
   _DOMSelectionJs getSelection() native;
 
   _MediaQueryListJs matchMedia(String query) native;
 
   void moveBy(num x, num y) native;
 
   void moveTo(num x, num y) native;
 
-  _DOMWindowJs open(String url, String name, [String options = null]) native;
+  _DOMWindowJs open(String url, String name, [String options]) native;
 
-  _DatabaseJs openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback = null]) native;
+  _DatabaseJs openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback]) native;
 
-  void postMessage(message, String targetOrigin, [List messagePorts = null]) native;
+  void postMessage(message, String targetOrigin, [List messagePorts]) native;
 
   void print() native;
 
   String prompt(String message, String defaultValue) native;
 
   void releaseEvents() native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void resizeBy(num x, num y) native;
 
   void resizeTo(num width, num height) native;
 
   void scroll(int x, int y) native;
 
   void scrollBy(int x, int y) native;
 
   void scrollTo(int x, int y) native;
 
   int setInterval(TimeoutHandler handler, int timeout) native;
 
   int setTimeout(TimeoutHandler handler, int timeout) native;
 
-  Object showModalDialog(String url, [Object dialogArgs = null, String featureArgs = null]) native;
+  Object showModalDialog(String url, [Object dialogArgs, String featureArgs]) native;
 
   void stop() native;
 
   void webkitCancelAnimationFrame(int id) native;
 
   void webkitCancelRequestAnimationFrame(int id) native;
 
   _WebKitPointJs webkitConvertPointFromNodeToPage(_NodeJs node, _WebKitPointJs p) native;
 
   _WebKitPointJs webkitConvertPointFromPageToNode(_NodeJs node, _WebKitPointJs p) native;
 
-  void webkitPostMessage(message, String targetOrigin, [List transferList = null]) native;
+  void webkitPostMessage(message, String targetOrigin, [List transferList]) native;
 
   int webkitRequestAnimationFrame(RequestAnimationFrameCallback callback) native;
 
-  void webkitRequestFileSystem(int type, int size, FileSystemCallback successCallback, [ErrorCallback errorCallback = null]) native;
+  void webkitRequestFileSystem(int type, int size, FileSystemCallback successCallback, [ErrorCallback errorCallback]) native;
 
-  void webkitResolveLocalFileSystemURL(String url, [EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void webkitResolveLocalFileSystemURL(String url, [EntryCallback successCallback, ErrorCallback errorCallback]) native;
 
 }
 
 class _DataTransferItemJs extends _DOMTypeJs implements DataTransferItem native "*DataTransferItem" {
 
   final String kind;
 
   final String type;
 
   _BlobJs getAsFile() native;
 
-  void getAsString([StringCallback callback = null]) native;
+  void getAsString([StringCallback callback]) native;
 
   _EntryJs webkitGetAsEntry() native;
 }
 
 class _DataTransferItemListJs extends _DOMTypeJs implements DataTransferItemList native "*DataTransferItemList" {
 
   final int length;
 
-  void add(data_OR_file, [String type = null]) native;
+  void add(data_OR_file, [String type]) native;
 
   void clear() native;
 
   _DataTransferItemJs item(int index) native;
 }
 
 class _DataViewJs extends _ArrayBufferViewJs implements DataView native "*DataView" {
 
-  num getFloat32(int byteOffset, [bool littleEndian = null]) native;
+  num getFloat32(int byteOffset, [bool littleEndian]) native;
 
-  num getFloat64(int byteOffset, [bool littleEndian = null]) native;
+  num getFloat64(int byteOffset, [bool littleEndian]) native;
 
-  int getInt16(int byteOffset, [bool littleEndian = null]) native;
+  int getInt16(int byteOffset, [bool littleEndian]) native;
 
-  int getInt32(int byteOffset, [bool littleEndian = null]) native;
+  int getInt32(int byteOffset, [bool littleEndian]) native;
 
   int getInt8(int byteOffset) native;
 
-  int getUint16(int byteOffset, [bool littleEndian = null]) native;
+  int getUint16(int byteOffset, [bool littleEndian]) native;
 
-  int getUint32(int byteOffset, [bool littleEndian = null]) native;
+  int getUint32(int byteOffset, [bool littleEndian]) native;
 
   int getUint8(int byteOffset) native;
 
-  void setFloat32(int byteOffset, num value, [bool littleEndian = null]) native;
+  void setFloat32(int byteOffset, num value, [bool littleEndian]) native;
 
-  void setFloat64(int byteOffset, num value, [bool littleEndian = null]) native;
+  void setFloat64(int byteOffset, num value, [bool littleEndian]) native;
 
-  void setInt16(int byteOffset, int value, [bool littleEndian = null]) native;
+  void setInt16(int byteOffset, int value, [bool littleEndian]) native;
 
-  void setInt32(int byteOffset, int value, [bool littleEndian = null]) native;
+  void setInt32(int byteOffset, int value, [bool littleEndian]) native;
 
   void setInt8(int byteOffset, int value) native;
 
-  void setUint16(int byteOffset, int value, [bool littleEndian = null]) native;
+  void setUint16(int byteOffset, int value, [bool littleEndian]) native;
 
-  void setUint32(int byteOffset, int value, [bool littleEndian = null]) native;
+  void setUint32(int byteOffset, int value, [bool littleEndian]) native;
 
   void setUint8(int byteOffset, int value) native;
 }
 
 class _DatabaseJs extends _DOMTypeJs implements Database native "*Database" {
 
   final String version;
 
-  void changeVersion(String oldVersion, String newVersion, [SQLTransactionCallback callback = null, SQLTransactionErrorCallback errorCallback = null, VoidCallback successCallback = null]) native;
+  void changeVersion(String oldVersion, String newVersion, [SQLTransactionCallback callback, SQLTransactionErrorCallback errorCallback, VoidCallback successCallback]) native;
 
-  void readTransaction(SQLTransactionCallback callback, [SQLTransactionErrorCallback errorCallback = null, VoidCallback successCallback = null]) native;
+  void readTransaction(SQLTransactionCallback callback, [SQLTransactionErrorCallback errorCallback, VoidCallback successCallback]) native;
 
-  void transaction(SQLTransactionCallback callback, [SQLTransactionErrorCallback errorCallback = null, VoidCallback successCallback = null]) native;
+  void transaction(SQLTransactionCallback callback, [SQLTransactionErrorCallback errorCallback, VoidCallback successCallback]) native;
 }
 
 class _DatabaseSyncJs extends _DOMTypeJs implements DatabaseSync native "*DatabaseSync" {
 
   final String lastErrorMessage;
 
   final String version;
 
-  void changeVersion(String oldVersion, String newVersion, [SQLTransactionSyncCallback callback = null]) native;
+  void changeVersion(String oldVersion, String newVersion, [SQLTransactionSyncCallback callback]) native;
 
   void readTransaction(SQLTransactionSyncCallback callback) native;
 
   void transaction(SQLTransactionSyncCallback callback) native;
 }
 
 class _DedicatedWorkerContextJs extends _WorkerContextJs implements DedicatedWorkerContext native "*DedicatedWorkerContext" {
 
-  void postMessage(Object message, [List messagePorts = null]) native;
+  void postMessage(Object message, [List messagePorts]) native;
 
-  void webkitPostMessage(Object message, [List transferList = null]) native;
+  void webkitPostMessage(Object message, [List transferList]) native;
 }
 
 class _DelayNodeJs extends _AudioNodeJs implements DelayNode native "*DelayNode" {
 
   final _AudioParamJs delayTime;
 }
 
 class _DeprecatedPeerConnectionJs extends _EventTargetJs implements DeprecatedPeerConnection native "*DeprecatedPeerConnection" {
 
   static final int ACTIVE = 2;
 
   static final int CLOSED = 3;
 
   static final int NEGOTIATING = 1;
 
   static final int NEW = 0;
 
   final _MediaStreamListJs localStreams;
 
   final int readyState;
 
   final _MediaStreamListJs remoteStreams;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void addStream(_MediaStreamJs stream) native;
 
   void close() native;
 
   bool dispatchEvent(_EventJs event) native;
 
   void processSignalingMessage(String message) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void removeStream(_MediaStreamJs stream) native;
 
   void send(String text) native;
 }
 
 class _DeviceMotionEventJs extends _EventJs implements DeviceMotionEvent native "*DeviceMotionEvent" {
 
   final num interval;
 }
 
 class _DeviceOrientationEventJs extends _EventJs implements DeviceOrientationEvent native "*DeviceOrientationEvent" {
 
   final bool absolute;
 
   final num alpha;
 
   final num beta;
 
   final num gamma;
 
   void initDeviceOrientationEvent(String type, bool bubbles, bool cancelable, num alpha, num beta, num gamma, bool absolute) native;
 }
 
 class _DirectoryEntryJs extends _EntryJs implements DirectoryEntry native "*DirectoryEntry" {
 
   _DirectoryReaderJs createReader() native;
 
-  void getDirectory(String path, [Object flags = null, EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void getDirectory(String path, [Object flags, EntryCallback successCallback, ErrorCallback errorCallback]) native;
 
-  void getFile(String path, [Object flags = null, EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void getFile(String path, [Object flags, EntryCallback successCallback, ErrorCallback errorCallback]) native;
 
-  void removeRecursively(VoidCallback successCallback, [ErrorCallback errorCallback = null]) native;
+  void removeRecursively(VoidCallback successCallback, [ErrorCallback errorCallback]) native;
 }
 
 class _DirectoryEntrySyncJs extends _EntrySyncJs implements DirectoryEntrySync native "*DirectoryEntrySync" {
 
   _DirectoryReaderSyncJs createReader() native;
 
   _DirectoryEntrySyncJs getDirectory(String path, Object flags) native;
 
   _FileEntrySyncJs getFile(String path, Object flags) native;
 
   void removeRecursively() native;
 }
 
 class _DirectoryReaderJs extends _DOMTypeJs implements DirectoryReader native "*DirectoryReader" {
 
-  void readEntries(EntriesCallback successCallback, [ErrorCallback errorCallback = null]) native;
+  void readEntries(EntriesCallback successCallback, [ErrorCallback errorCallback]) native;
 }
 
 class _DirectoryReaderSyncJs extends _DOMTypeJs implements DirectoryReaderSync native "*DirectoryReaderSync" {
 
   _EntryArraySyncJs readEntries() native;
 }
 
 class _DocumentJs extends _NodeJs implements Document native "*Document" {
 
   final String URL;
@@ skipping 129 matching lines @@
   _NodeListJs getElementsByName(String elementName) native;
 
   _NodeListJs getElementsByTagName(String tagname) native;
 
   _NodeListJs getElementsByTagNameNS(String namespaceURI, String localName) native;
 
   _CSSStyleDeclarationJs getOverrideStyle(_ElementJs element, String pseudoElement) native;
 
   _DOMSelectionJs getSelection() native;
 
-  _NodeJs importNode(_NodeJs importedNode, [bool deep = null]) native;
+  _NodeJs importNode(_NodeJs importedNode, [bool deep]) native;
 
   bool queryCommandEnabled(String command) native;
 
   bool queryCommandIndeterm(String command) native;
 
   bool queryCommandState(String command) native;
 
   bool queryCommandSupported(String command) native;
 
   String queryCommandValue(String command) native;
@@ skipping 134 matching lines @@
   void removeAttribute(String name) native;
 
   void removeAttributeNS(String namespaceURI, String localName) native;
 
   _AttrJs removeAttributeNode(_AttrJs oldAttr) native;
 
   void scrollByLines(int lines) native;
 
   void scrollByPages(int pages) native;
 
-  void scrollIntoView([bool alignWithTop = null]) native;
+  void scrollIntoView([bool alignWithTop]) native;
 
-  void scrollIntoViewIfNeeded([bool centerIfNeeded = null]) native;
+  void scrollIntoViewIfNeeded([bool centerIfNeeded]) native;
 
   void setAttribute(String name, String value) native;
 
   void setAttributeNS(String namespaceURI, String qualifiedName, String value) native;
 
   _AttrJs setAttributeNode(_AttrJs newAttr) native;
 
   _AttrJs setAttributeNodeNS(_AttrJs newAttr) native;
 
   bool webkitMatchesSelector(String selectors) native;
@@ skipping 22 matching lines @@
   final _DOMFileSystemJs filesystem;
 
   final String fullPath;
 
   final bool isDirectory;
 
   final bool isFile;
 
   final String name;
 
-  void copyTo(_DirectoryEntryJs parent, [String name = null, EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void copyTo(_DirectoryEntryJs parent, [String name, EntryCallback successCallback, ErrorCallback errorCallback]) native;
 
-  void getMetadata(MetadataCallback successCallback, [ErrorCallback errorCallback = null]) native;
+  void getMetadata(MetadataCallback successCallback, [ErrorCallback errorCallback]) native;
 
-  void getParent([EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void getParent([EntryCallback successCallback, ErrorCallback errorCallback]) native;
 
-  void moveTo(_DirectoryEntryJs parent, [String name = null, EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void moveTo(_DirectoryEntryJs parent, [String name, EntryCallback successCallback, ErrorCallback errorCallback]) native;
 
-  void remove(VoidCallback successCallback, [ErrorCallback errorCallback = null]) native;
+  void remove(VoidCallback successCallback, [ErrorCallback errorCallback]) native;
 
   String toURL() native;
 }
 
 class _EntryArrayJs extends _DOMTypeJs implements EntryArray native "*EntryArray" {
 
   final int length;
 
   _EntryJs item(int index) native;
 }
@@ skipping 136 matching lines @@
   static final int CONNECTING = 0;
 
   static final int OPEN = 1;
 
   final String URL;
 
   final int readyState;
 
   final String url;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void close() native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _EventTargetJs extends _DOMTypeJs implements EventTarget native "*EventTarget" {
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs event) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _FileJs extends _BlobJs implements File native "*File" {
 
   final Date lastModifiedDate;
 
   final String name;
 
   final String webkitRelativePath;
 }
 
 class _FileEntryJs extends _EntryJs implements FileEntry native "*FileEntry" {
 
-  void createWriter(FileWriterCallback successCallback, [ErrorCallback errorCallback = null]) native;
+  void createWriter(FileWriterCallback successCallback, [ErrorCallback errorCallback]) native;
 
-  void file(FileCallback successCallback, [ErrorCallback errorCallback = null]) native;
+  void file(FileCallback successCallback, [ErrorCallback errorCallback]) native;
 }
 
 class _FileEntrySyncJs extends _EntrySyncJs implements FileEntrySync native "*FileEntrySync" {
 
   _FileWriterSyncJs createWriter() native;
 
   _FileJs file() native;
 }
 
 class _FileErrorJs extends _DOMTypeJs implements FileError native "*FileError" {
@@ skipping 158 matching lines @@
   static final int LOADING = 1;
 
   final _FileErrorJs error;
 
   final int readyState;
 
   final Object result;
 
   void abort() native;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   void readAsArrayBuffer(_BlobJs blob) native;
 
   void readAsBinaryString(_BlobJs blob) native;
 
   void readAsDataURL(_BlobJs blob) native;
 
-  void readAsText(_BlobJs blob, [String encoding = null]) native;
+  void readAsText(_BlobJs blob, [String encoding]) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _FileReaderSyncJs extends _DOMTypeJs implements FileReaderSync native "*FileReaderSync" {
 
   _ArrayBufferJs readAsArrayBuffer(_BlobJs blob) native;
 
   String readAsBinaryString(_BlobJs blob) native;
 
   String readAsDataURL(_BlobJs blob) native;
 
-  String readAsText(_BlobJs blob, [String encoding = null]) native;
+  String readAsText(_BlobJs blob, [String encoding]) native;
 }
 
 class _FileWriterJs extends _EventTargetJs implements FileWriter native "*FileWriter" {
 
   static final int DONE = 2;
 
   static final int INIT = 0;
 
   static final int WRITING = 1;
 
   final _FileErrorJs error;
 
   final int length;
 
   final int position;
 
   final int readyState;
 
   void abort() native;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void seek(int position) native;
 
   void truncate(int size) native;
 
   void write(_BlobJs data) native;
 }
 
 class _FileWriterSyncJs extends _DOMTypeJs implements FileWriterSync native "*FileWriterSync" {
 
@@ skipping 87 matching lines @@
 
   void insertRange(int start, int rangeLength, [num initialValue]) {
     throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
   }
 
   List<num> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <num>[]);
 
   // -- end List<num> mixins.
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Float32ArrayJs subarray(int start, [int end = null]) native;
+  _Float32ArrayJs subarray(int start, [int end]) native;
 }
 
 class _Float64ArrayJs extends _ArrayBufferViewJs implements Float64Array, List<num> native "*Float64Array" {
 
   static final int BYTES_PER_ELEMENT = 8;
 
   final int length;
 
   num operator[](int index) native "return this[index];";
 
@@ skipping 68 matching lines @@
 
   void insertRange(int start, int rangeLength, [num initialValue]) {
     throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
   }
 
   List<num> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <num>[]);
 
   // -- end List<num> mixins.
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Float64ArrayJs subarray(int start, [int end = null]) native;
+  _Float64ArrayJs subarray(int start, [int end]) native;
 }
 
 class _GeolocationJs extends _DOMTypeJs implements Geolocation native "*Geolocation" {
 
   void clearWatch(int watchId) native;
 
-  void getCurrentPosition(PositionCallback successCallback, [PositionErrorCallback errorCallback = null, Object options = null]) native;
+  void getCurrentPosition(PositionCallback successCallback, [PositionErrorCallback errorCallback, Object options]) native;
 
-  int watchPosition(PositionCallback successCallback, [PositionErrorCallback errorCallback = null, Object options = null]) native;
+  int watchPosition(PositionCallback successCallback, [PositionErrorCallback errorCallback, Object options]) native;
 }
 
 class _GeopositionJs extends _DOMTypeJs implements Geoposition native "*Geoposition" {
 
   final _CoordinatesJs coords;
 
   final int timestamp;
 }
 
 class _HTMLAllCollectionJs extends _DOMTypeJs implements HTMLAllCollection native "*HTMLAllCollection" {
@@ skipping 740 matching lines @@
   int width;
 
   final bool willValidate;
 
   bool checkValidity() native;
 
   void select() native;
 
   void setCustomValidity(String error) native;
 
-  void setSelectionRange(int start, int end, [String direction = null]) native;
+  void setSelectionRange(int start, int end, [String direction]) native;
 
-  void stepDown([int n = null]) native;
+  void stepDown([int n]) native;
 
-  void stepUp([int n = null]) native;
+  void stepUp([int n]) native;
 }
 
 class _HTMLKeygenElementJs extends _HTMLElementJs implements HTMLKeygenElement native "*HTMLKeygenElement" {
 
   bool autofocus;
 
   String challenge;
 
   bool disabled;
 
@@ skipping 195 matching lines @@
   final bool webkitHasClosedCaptions;
 
   final String webkitMediaSourceURL;
 
   bool webkitPreservesPitch;
 
   final int webkitSourceState;
 
   final int webkitVideoDecodedByteCount;
 
-  _TextTrackJs addTextTrack(String kind, [String label = null, String language = null]) native;
+  _TextTrackJs addTextTrack(String kind, [String label, String language]) native;
 
   String canPlayType(String type, String keySystem) native;
 
   void load() native;
 
   void pause() native;
 
   void play() native;
 
-  void webkitAddKey(String keySystem, _Uint8ArrayJs key, [_Uint8ArrayJs initData = null, String sessionId = null]) native;
+  void webkitAddKey(String keySystem, _Uint8ArrayJs key, [_Uint8ArrayJs initData, String sessionId]) native;
 
   void webkitCancelKeyRequest(String keySystem, String sessionId) native;
 
-  void webkitGenerateKeyRequest(String keySystem, [_Uint8ArrayJs initData = null]) native;
+  void webkitGenerateKeyRequest(String keySystem, [_Uint8ArrayJs initData]) native;
 
   void webkitSourceAbort(String id) native;
 
   void webkitSourceAddId(String id, String type) native;
 
   void webkitSourceAppend(String id, _Uint8ArrayJs data) native;
 
   _TimeRangesJs webkitSourceBuffered(String id) native;
 
   void webkitSourceEndOfStream(int status) native;
@@ skipping 491 matching lines @@
   final bool willValidate;
 
   String wrap;
 
   bool checkValidity() native;
 
   void select() native;
 
   void setCustomValidity(String error) native;
 
-  void setSelectionRange(int start, int end, [String direction = null]) native;
+  void setSelectionRange(int start, int end, [String direction]) native;
 }
 
 class _HTMLTitleElementJs extends _HTMLElementJs implements HTMLTitleElement native "*HTMLTitleElement" {
 
   String text;
 }
 
 class _HTMLTrackElementJs extends _HTMLElementJs implements HTMLTrackElement native "*HTMLTrackElement" {
 
   static final int ERROR = 3;
@@ skipping 73 matching lines @@
   final int length;
 
   final state;
 
   void back() native;
 
   void forward() native;
 
   void go(int distance) native;
 
-  void pushState(Object data, String title, [String url = null]) native;
+  void pushState(Object data, String title, [String url]) native;
 
-  void replaceState(Object data, String title, [String url = null]) native;
+  void replaceState(Object data, String title, [String url]) native;
 }
 
 class _IDBAnyJs extends _DOMTypeJs implements IDBAny native "*IDBAny" {
 }
 
 class _IDBCursorJs extends _DOMTypeJs implements IDBCursor native "*IDBCursor" {
 
   static final int NEXT = 0;
 
   static final int NEXT_NO_DUPLICATE = 1;
 
   static final int PREV = 2;
 
   static final int PREV_NO_DUPLICATE = 3;
 
   final String direction;
 
   final key;
 
   final primaryKey;
 
   final source;
 
   void advance(int count) native;
 
-  void continueFunction([key = null]) native '''
+  void continueFunction([key]) native '''
         if (key == null) return this['continue']();
         return this['continue'](key);
       ''';
 
   _IDBRequestJs delete() native;
 
   _IDBRequestJs update(value) native;
 }
 
 class _IDBCursorWithValueJs extends _IDBCursorJs implements IDBCursorWithValue native "*IDBCursorWithValue" {
 
   final value;
 }
 
 class _IDBDatabaseJs extends _EventTargetJs implements IDBDatabase native "*IDBDatabase" {
 
   final String name;
 
   final List<String> objectStoreNames;
 
   final String version;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void close() native;
 
-  _IDBObjectStoreJs createObjectStore(String name, [Map options = null]) native;
+  _IDBObjectStoreJs createObjectStore(String name, [Map options]) native;
 
   void deleteObjectStore(String name) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   _IDBVersionChangeRequestJs setVersion(String version) native;
 
   _IDBTransactionJs transaction(storeName_OR_storeNames, String mode) native;
 }
 
 class _IDBDatabaseExceptionJs extends _DOMTypeJs implements IDBDatabaseException native "*IDBDatabaseException" {
 
   static final int ABORT_ERR = 20;
 
@@ skipping 48 matching lines @@
   final keyPath;
 
   final bool multiEntry;
 
   final String name;
 
   final _IDBObjectStoreJs objectStore;
 
   final bool unique;
 
-  _IDBRequestJs count([key_OR_range = null]) native;
+  _IDBRequestJs count([key_OR_range]) native;
 
   _IDBRequestJs get(key) native;
 
   _IDBRequestJs getKey(key) native;
 
-  _IDBRequestJs openCursor([key_OR_range = null, direction = null]) native;
+  _IDBRequestJs openCursor([key_OR_range, direction]) native;
 
-  _IDBRequestJs openKeyCursor([key_OR_range = null, direction = null]) native;
+  _IDBRequestJs openKeyCursor([key_OR_range, direction]) native;
 }
 
 class _IDBKeyJs extends _DOMTypeJs implements IDBKey native "*IDBKey" {
 }
 
 class _IDBKeyRangeJs extends _DOMTypeJs implements IDBKeyRange native "*IDBKeyRange" {
 
   final lower;
 
   final bool lowerOpen;
 
   final upper;
 
   final bool upperOpen;
 }
 
 class _IDBObjectStoreJs extends _DOMTypeJs implements IDBObjectStore native "*IDBObjectStore" {
 
   final bool autoIncrement;
 
   final List<String> indexNames;
 
   final keyPath;
 
   final String name;
 
   final _IDBTransactionJs transaction;
 
-  _IDBRequestJs add(value, [key = null]) native;
+  _IDBRequestJs add(value, [key]) native;
 
   _IDBRequestJs clear() native;
 
-  _IDBRequestJs count([key_OR_range = null]) native;
+  _IDBRequestJs count([key_OR_range]) native;
 
-  _IDBIndexJs createIndex(String name, keyPath, [Map options = null]) native;
+  _IDBIndexJs createIndex(String name, keyPath, [Map options]) native;
 
   _IDBRequestJs delete(key_OR_keyRange) native;
 
   void deleteIndex(String name) native;
 
   _IDBRequestJs getObject(key) native 'get';
 
   _IDBIndexJs index(String name) native;
 
-  _IDBRequestJs openCursor([key_OR_range = null, direction = null]) native;
+  _IDBRequestJs openCursor([key_OR_range, direction]) native;
 
-  _IDBRequestJs put(value, [key = null]) native;
+  _IDBRequestJs put(value, [key]) native;
 }
 
 class _IDBRequestJs extends _EventTargetJs implements IDBRequest native "*IDBRequest" {
 
   final _DOMErrorJs error;
 
   final int errorCode;
 
   final String readyState;
 
   final result;
 
   final source;
 
   final _IDBTransactionJs transaction;
 
   final String webkitErrorMessage;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _IDBTransactionJs extends _EventTargetJs implements IDBTransaction native "*IDBTransaction" {
 
   static final int READ_ONLY = 0;
 
   static final int READ_WRITE = 1;
 
   static final int VERSION_CHANGE = 2;
 
   final _IDBDatabaseJs db;
 
   final _DOMErrorJs error;
 
   final String mode;
 
   void abort() native;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   _IDBObjectStoreJs objectStore(String name) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _IDBVersionChangeEventJs extends _EventJs implements IDBVersionChangeEvent native "*IDBVersionChangeEvent" {
 
   final String version;
 }
 
 class _IDBVersionChangeRequestJs extends _IDBRequestJs implements IDBVersionChangeRequest native "*IDBVersionChangeRequest" {
 
   // From EventTarget
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs event) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _IceCandidateJs extends _DOMTypeJs implements IceCandidate native "*IceCandidate" {
 
   final String label;
 
   String toSdp() native;
 }
 
 class _ImageDataJs extends _DOMTypeJs implements ImageData native "*ImageData" {
@@ skipping 84 matching lines @@
 
   void insertRange(int start, int rangeLength, [int initialValue]) {
     throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
   }
 
   List<int> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <int>[]);
 
   // -- end List<int> mixins.
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Int16ArrayJs subarray(int start, [int end = null]) native;
+  _Int16ArrayJs subarray(int start, [int end]) native;
 }
 
 class _Int32ArrayJs extends _ArrayBufferViewJs implements Int32Array, List<int> native "*Int32Array" {
 
   static final int BYTES_PER_ELEMENT = 4;
 
   final int length;
 
   int operator[](int index) native "return this[index];";
 
@@ skipping 68 matching lines @@
 
   void insertRange(int start, int rangeLength, [int initialValue]) {
     throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
   }
 
   List<int> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <int>[]);
 
   // -- end List<int> mixins.
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Int32ArrayJs subarray(int start, [int end = null]) native;
+  _Int32ArrayJs subarray(int start, [int end]) native;
 }
 
 class _Int8ArrayJs extends _ArrayBufferViewJs implements Int8Array, List<int> native "*Int8Array" {
 
   static final int BYTES_PER_ELEMENT = 1;
 
   final int length;
 
   int operator[](int index) native "return this[index];";
 
@@ skipping 68 matching lines @@
 
   void insertRange(int start, int rangeLength, [int initialValue]) {
     throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
   }
 
   List<int> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <int>[]);
 
   // -- end List<int> mixins.
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Int8ArrayJs subarray(int start, [int end = null]) native;
+  _Int8ArrayJs subarray(int start, [int end]) native;
 }
 
 class _JavaScriptAudioNodeJs extends _AudioNodeJs implements JavaScriptAudioNode native "*JavaScriptAudioNode" {
 
   final int bufferSize;
 
   // From EventTarget
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs event) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _JavaScriptCallFrameJs extends _DOMTypeJs implements JavaScriptCallFrame native "*JavaScriptCallFrame" {
 
   static final int CATCH_SCOPE = 4;
 
   static final int CLOSURE_SCOPE = 3;
 
   static final int GLOBAL_SCOPE = 0;
 
@@ skipping 40 matching lines @@
 
   void initKeyboardEvent(String type, bool canBubble, bool cancelable, _DOMWindowJs view, String keyIdentifier, int keyLocation, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool altGraphKey) native;
 }
 
 class _LocalMediaStreamJs extends _MediaStreamJs implements LocalMediaStream native "*LocalMediaStream" {
 
   void stop() native;
 
   // From EventTarget
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs event) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _LocationJs extends _DOMTypeJs implements Location native "*Location" {
 
   final List<String> ancestorOrigins;
 
   String hash;
 
   String host;
 
@@ skipping 35 matching lines @@
   final bool paused;
 
   num playbackRate;
 
   final _TimeRangesJs played;
 
   final _TimeRangesJs seekable;
 
   num volume;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   void pause() native;
 
   void play() native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _MediaElementAudioSourceNodeJs extends _AudioSourceNodeJs implements MediaElementAudioSourceNode native "*MediaElementAudioSourceNode" {
 
   final _HTMLMediaElementJs mediaElement;
 }
 
 class _MediaErrorJs extends _DOMTypeJs implements MediaError native "*MediaError" {
 
   static final int MEDIA_ERR_ABORTED = 1;
@@ skipping 156 matching lines @@
   static final int LIVE = 1;
 
   final _MediaStreamTrackListJs audioTracks;
 
   final String label;
 
   final int readyState;
 
   final _MediaStreamTrackListJs videoTracks;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs event) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _MediaStreamEventJs extends _EventJs implements MediaStreamEvent native "*MediaStreamEvent" {
 
   final _MediaStreamJs stream;
 }
 
 class _MediaStreamListJs extends _DOMTypeJs implements MediaStreamList native "*MediaStreamList" {
 
   final int length;
@@ skipping 45 matching lines @@
 
   final _DOMWindowJs source;
 
   void initMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, _DOMWindowJs sourceArg, List messagePorts) native;
 
   void webkitInitMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, _DOMWindowJs sourceArg, List transferables) native;
 }
 
 class _MessagePortJs extends _EventTargetJs implements MessagePort native "*MessagePort" {
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void close() native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void postMessage(String message, [List messagePorts = null]) native;
+  void postMessage(String message, [List messagePorts]) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void start() native;
 
-  void webkitPostMessage(String message, [List transfer = null]) native;
+  void webkitPostMessage(String message, [List transfer]) native;
 }
 
 class _MetadataJs extends _DOMTypeJs implements Metadata native "*Metadata" {
 
   final Date modificationTime;
 
   final int size;
 }
 
 class _MouseEventJs extends _UIEventJs implements MouseEvent native "*MouseEvent" {
@@ skipping 220 matching lines @@
   final _BatteryManagerJs webkitBattery;
 
   final _PointerLockJs webkitPointer;
 
   void getStorageUpdates() native;
 
   bool javaEnabled() native;
 
   void registerProtocolHandler(String scheme, String url, String title) native;
 
-  void webkitGetUserMedia(Map options, NavigatorUserMediaSuccessCallback successCallback, [NavigatorUserMediaErrorCallback errorCallback = null]) native;
+  void webkitGetUserMedia(Map options, NavigatorUserMediaSuccessCallback successCallback, [NavigatorUserMediaErrorCallback errorCallback]) native;
 }
 
 class _NavigatorUserMediaErrorJs extends _DOMTypeJs implements NavigatorUserMediaError native "*NavigatorUserMediaError" {
 
   static final int PERMISSION_DENIED = 1;
 
   final int code;
 }
 
 class _NodeJs extends _EventTargetJs implements Node native "*Node" {
@@ skipping 61 matching lines @@
   final _ElementJs parentElement;
 
   final _NodeJs parentNode;
 
   String prefix;
 
   final _NodeJs previousSibling;
 
   String textContent;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   _NodeJs appendChild(_NodeJs newChild) native;
 
   _NodeJs cloneNode(bool deep) native;
 
   int compareDocumentPosition(_NodeJs other) native;
 
   bool contains(_NodeJs other) native;
 
   bool dispatchEvent(_EventJs event) native;
@@ skipping 13 matching lines @@
   bool isSupported(String feature, String version) native;
 
   String lookupNamespaceURI(String prefix) native;
 
   String lookupPrefix(String namespaceURI) native;
 
   void normalize() native;
 
   _NodeJs removeChild(_NodeJs oldChild) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   _NodeJs replaceChild(_NodeJs newChild, _NodeJs oldChild) native;
 }
 
 class _NodeFilterJs extends _DOMTypeJs implements NodeFilter native "*NodeFilter" {
 
   static final int FILTER_ACCEPT = 1;
 
   static final int FILTER_REJECT = 2;
 
@@ skipping 146 matching lines @@
 }
 
 class _NotificationJs extends _EventTargetJs implements Notification native "*Notification" {
 
   String dir;
 
   String replaceId;
 
   String tag;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void cancel() native;
 
   void close() native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void show() native;
 }
 
 class _NotificationCenterJs extends _DOMTypeJs implements NotificationCenter native "*NotificationCenter" {
 
   int checkPermission() native;
 
   _NotificationJs createHTMLNotification(String url) native;
 
@@ skipping 123 matching lines @@
   final _SessionDescriptionJs localDescription;
 
   final _MediaStreamListJs localStreams;
 
   final int readyState;
 
   final _SessionDescriptionJs remoteDescription;
 
   final _MediaStreamListJs remoteStreams;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
-  void addStream(_MediaStreamJs stream, [Map mediaStreamHints = null]) native;
+  void addStream(_MediaStreamJs stream, [Map mediaStreamHints]) native;
 
   void close() native;
 
-  _SessionDescriptionJs createAnswer(String offer, [Map mediaHints = null]) native;
+  _SessionDescriptionJs createAnswer(String offer, [Map mediaHints]) native;
 
-  _SessionDescriptionJs createOffer([Map mediaHints = null]) native;
+  _SessionDescriptionJs createOffer([Map mediaHints]) native;
 
   bool dispatchEvent(_EventJs event) native;
 
   void processIceMessage(_IceCandidateJs candidate) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void removeStream(_MediaStreamJs stream) native;
 
   void setLocalDescription(int action, _SessionDescriptionJs desc) native;
 
   void setRemoteDescription(int action, _SessionDescriptionJs desc) native;
 
-  void startIce([Map iceOptions = null]) native;
+  void startIce([Map iceOptions]) native;
 }
 
 class _PerformanceJs extends _DOMTypeJs implements Performance native "*Performance" {
 
   final _MemoryInfoJs memory;
 
   final _PerformanceNavigationJs navigation;
 
   final _PerformanceTimingJs timing;
 
@@ skipping 57 matching lines @@
 
   final int unloadEventEnd;
 
   final int unloadEventStart;
 }
 
 class _PointerLockJs extends _DOMTypeJs implements PointerLock native "*PointerLock" {
 
   final bool isLocked;
 
-  void lock(_ElementJs target, [VoidCallback successCallback = null, VoidCallback failureCallback = null]) native;
+  void lock(_ElementJs target, [VoidCallback successCallback, VoidCallback failureCallback]) native;
 
   void unlock() native;
 }
 
 class _PopStateEventJs extends _EventJs implements PopStateEvent native "*PopStateEvent" {
 
   final Object state;
 }
 
 class _PositionErrorJs extends _DOMTypeJs implements PositionError native "*PositionError" {
@@ skipping 744 matching lines @@
   final _SVGElementInstanceJs firstChild;
 
   final _SVGElementInstanceJs lastChild;
 
   final _SVGElementInstanceJs nextSibling;
 
   final _SVGElementInstanceJs parentNode;
 
   final _SVGElementInstanceJs previousSibling;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs event) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _SVGElementInstanceListJs extends _DOMTypeJs implements SVGElementInstanceList native "*SVGElementInstanceList" {
 
   final int length;
 
   _SVGElementInstanceJs item(int index) native;
 }
 
 class _SVGEllipseElementJs extends _SVGElementJs implements SVGEllipseElement native "*SVGEllipseElement" {
@@ skipping 2763 matching lines @@
 
   String src;
 
   num weight;
 }
 
 class _SpeechGrammarListJs extends _DOMTypeJs implements SpeechGrammarList native "*SpeechGrammarList" {
 
   final int length;
 
-  void addFromString(String string, [num weight = null]) native;
+  void addFromString(String string, [num weight]) native;
 
-  void addFromUri(String src, [num weight = null]) native;
+  void addFromUri(String src, [num weight]) native;
 
   _SpeechGrammarJs item(int index) native;
 }
 
 class _SpeechInputEventJs extends _EventJs implements SpeechInputEvent native "*SpeechInputEvent" {
 
   final _SpeechInputResultListJs results;
 }
 
 class _SpeechInputResultJs extends _DOMTypeJs implements SpeechInputResult native "*SpeechInputResult" {
@@ skipping 13 matching lines @@
 class _SpeechRecognitionJs extends _EventTargetJs implements SpeechRecognition native "*SpeechRecognition" {
 
   bool continuous;
 
   _SpeechGrammarListJs grammars;
 
   String lang;
 
   void abort() native;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void start() native;
 
   void stop() native;
 }
 
 class _SpeechRecognitionAlternativeJs extends _DOMTypeJs implements SpeechRecognitionAlternative native "*SpeechRecognitionAlternative" {
 
   final num confidence;
 
@@ skipping 255 matching lines @@
   final String kind;
 
   final String label;
 
   final String language;
 
   int mode;
 
   void addCue(_TextTrackCueJs cue) native;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   void removeCue(_TextTrackCueJs cue) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _TextTrackCueJs extends _EventTargetJs implements TextTrackCue native "*TextTrackCue" {
 
   String align;
 
   num endTime;
 
   String id;
 
   int line;
 
   bool pauseOnExit;
 
   int position;
 
   int size;
 
   bool snapToLines;
 
   num startTime;
 
   String text;
 
   final _TextTrackJs track;
 
   String vertical;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   _DocumentFragmentJs getCueAsHTML() native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _TextTrackCueListJs extends _DOMTypeJs implements TextTrackCueList native "*TextTrackCueList" {
 
   final int length;
 
   _TextTrackCueJs getCueById(String id) native;
 
   _TextTrackCueJs item(int index) native;
 }
 
 class _TextTrackListJs extends _EventTargetJs implements TextTrackList native "*TextTrackList" {
 
   final int length;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   _TextTrackJs item(int index) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _TimeRangesJs extends _DOMTypeJs implements TimeRanges native "*TimeRanges" {
 
   final int length;
 
   num end(int index) native;
 
   num start(int index) native;
 }
@@ skipping 267 matching lines @@
 
   void insertRange(int start, int rangeLength, [int initialValue]) {
     throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
   }
 
   List<int> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <int>[]);
 
   // -- end List<int> mixins.
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Uint16ArrayJs subarray(int start, [int end = null]) native;
+  _Uint16ArrayJs subarray(int start, [int end]) native;
 }
 
 class _Uint32ArrayJs extends _ArrayBufferViewJs implements Uint32Array, List<int> native "*Uint32Array" {
 
   static final int BYTES_PER_ELEMENT = 4;
 
   final int length;
 
   int operator[](int index) native "return this[index];";
 
@@ skipping 68 matching lines @@
 
   void insertRange(int start, int rangeLength, [int initialValue]) {
     throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
   }
 
   List<int> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <int>[]);
 
   // -- end List<int> mixins.
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Uint32ArrayJs subarray(int start, [int end = null]) native;
+  _Uint32ArrayJs subarray(int start, [int end]) native;
 }
 
 class _Uint8ArrayJs extends _ArrayBufferViewJs implements Uint8Array, List<int> native "*Uint8Array" {
 
   static final int BYTES_PER_ELEMENT = 1;
 
   final int length;
 
   int operator[](int index) native "return this[index];";
 
@@ skipping 68 matching lines @@
 
   void insertRange(int start, int rangeLength, [int initialValue]) {
     throw new UnsupportedOperationException("Cannot insertRange on immutable List.");
   }
 
   List<int> getRange(int start, int rangeLength) =>
       _Lists.getRange(this, start, rangeLength, <int>[]);
 
   // -- end List<int> mixins.
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Uint8ArrayJs subarray(int start, [int end = null]) native;
+  _Uint8ArrayJs subarray(int start, [int end]) native;
 }
 
 class _Uint8ClampedArrayJs extends _Uint8ArrayJs implements Uint8ClampedArray native "*Uint8ClampedArray" {
 
   // Use implementation from Uint8Array.
   // final int length;
 
-  void setElements(Object array, [int offset = null]) native 'set';
+  void setElements(Object array, [int offset]) native 'set';
 
-  _Uint8ClampedArrayJs subarray(int start, [int end = null]) native;
+  _Uint8ClampedArrayJs subarray(int start, [int end]) native;
 }
 
 class _ValidityStateJs extends _DOMTypeJs implements ValidityState native "*ValidityState" {
 
   final bool customError;
 
   final bool patternMismatch;
 
   final bool rangeOverflow;
 
@@ skipping 885 matching lines @@
   void stencilFuncSeparate(int face, int func, int ref, int mask) native;
 
   void stencilMask(int mask) native;
 
   void stencilMaskSeparate(int face, int mask) native;
 
   void stencilOp(int fail, int zfail, int zpass) native;
 
   void stencilOpSeparate(int face, int fail, int zfail, int zpass) native;
 
-  void texImage2D(int target, int level, int internalformat, int format_OR_width, int height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video, [int format = null, int type = null, _ArrayBufferViewJs pixels = null]) native;
+  void texImage2D(int target, int level, int internalformat, int format_OR_width, int height_OR_type, border_OR_canvas_OR_image_OR_pixels_OR_video, [int format, int type, _ArrayBufferViewJs pixels]) native;
 
   void texParameterf(int target, int pname, num param) native;
 
   void texParameteri(int target, int pname, int param) native;
 
-  void texSubImage2D(int target, int level, int xoffset, int yoffset, int format_OR_width, int height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video, [int type = null, _ArrayBufferViewJs pixels = null]) native;
+  void texSubImage2D(int target, int level, int xoffset, int yoffset, int format_OR_width, int height_OR_type, canvas_OR_format_OR_image_OR_pixels_OR_video, [int type, _ArrayBufferViewJs pixels]) native;
 
   void uniform1f(_WebGLUniformLocationJs location, num x) native;
 
   void uniform1fv(_WebGLUniformLocationJs location, _Float32ArrayJs v) native;
 
   void uniform1i(_WebGLUniformLocationJs location, int x) native;
 
   void uniform1iv(_WebGLUniformLocationJs location, _Int32ArrayJs v) native;
 
   void uniform2f(_WebGLUniformLocationJs location, num x, num y) native;
@@ skipping 335 matching lines @@
   final int bufferedAmount;
 
   final String extensions;
 
   final String protocol;
 
   final int readyState;
 
   final String url;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
-  void close([int code = null, String reason = null]) native;
+  void close([int code, String reason]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool send(String data) native;
 }
 
 class _WheelEventJs extends _UIEventJs implements WheelEvent native "*WheelEvent" {
 
   final bool altKey;
 
   final int clientX;
 
@@ skipping 23 matching lines @@
 
   final int x;
 
   final int y;
 
   void initWebKitWheelEvent(int wheelDeltaX, int wheelDeltaY, _DOMWindowJs view, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey) native;
 }
 
 class _WorkerJs extends _AbstractWorkerJs implements Worker native "*Worker" {
 
-  void postMessage(message, [List messagePorts = null]) native;
+  void postMessage(message, [List messagePorts]) native;
 
   void terminate() native;
 
-  void webkitPostMessage(message, [List messagePorts = null]) native;
+  void webkitPostMessage(message, [List messagePorts]) native;
 }
 
 class _WorkerContextJs extends _EventTargetJs implements WorkerContext native "*WorkerContext" {
 
   static final int PERSISTENT = 1;
 
   static final int TEMPORARY = 0;
 
   final _WorkerLocationJs location;
 
   final _WorkerNavigatorJs navigator;
 
   final _WorkerContextJs self;
 
   final _IDBFactoryJs webkitIndexedDB;
 
   final _NotificationCenterJs webkitNotifications;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   void clearInterval(int handle) native;
 
   void clearTimeout(int handle) native;
 
   void close() native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   void importScripts() native;
 
-  _DatabaseJs openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback = null]) native;
+  _DatabaseJs openDatabase(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback]) native;
 
-  _DatabaseSyncJs openDatabaseSync(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback = null]) native;
+  _DatabaseSyncJs openDatabaseSync(String name, String version, String displayName, int estimatedSize, [DatabaseCallback creationCallback]) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   int setInterval(TimeoutHandler handler, int timeout) native;
 
   int setTimeout(TimeoutHandler handler, int timeout) native;
 
-  void webkitRequestFileSystem(int type, int size, [FileSystemCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void webkitRequestFileSystem(int type, int size, [FileSystemCallback successCallback, ErrorCallback errorCallback]) native;
 
   _DOMFileSystemSyncJs webkitRequestFileSystemSync(int type, int size) native;
 
   _EntrySyncJs webkitResolveLocalFileSystemSyncURL(String url) native;
 
-  void webkitResolveLocalFileSystemURL(String url, [EntryCallback successCallback = null, ErrorCallback errorCallback = null]) native;
+  void webkitResolveLocalFileSystemURL(String url, [EntryCallback successCallback, ErrorCallback errorCallback]) native;
 }
 
 class _WorkerLocationJs extends _DOMTypeJs implements WorkerLocation native "*WorkerLocation" {
 
   final String hash;
 
   final String host;
 
   final String hostname;
 
@@ skipping 50 matching lines @@
   final int status;
 
   final String statusText;
 
   final _XMLHttpRequestUploadJs upload;
 
   bool withCredentials;
 
   void abort() native;
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
   String getAllResponseHeaders() native;
 
   String getResponseHeader(String header) native;
 
-  void open(String method, String url, [bool async = null, String user = null, String password = null]) native;
+  void open(String method, String url, [bool async, String user, String password]) native;
 
   void overrideMimeType(String override) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 
-  void send([data = null]) native;
+  void send([data]) native;
 
   void setRequestHeader(String header, String value) native;
 }
 
 class _XMLHttpRequestExceptionJs extends _DOMTypeJs implements XMLHttpRequestException native "*XMLHttpRequestException" {
 
   static final int ABORT_ERR = 102;
 
   static final int NETWORK_ERR = 101;
 
   final int code;
 
   final String message;
 
   final String name;
 
   String toString() native;
 }
 
 class _XMLHttpRequestProgressEventJs extends _ProgressEventJs implements XMLHttpRequestProgressEvent native "*XMLHttpRequestProgressEvent" {
 
   final int position;
 
   final int totalSize;
 }
 
 class _XMLHttpRequestUploadJs extends _EventTargetJs implements XMLHttpRequestUpload native "*XMLHttpRequestUpload" {
 
-  void addEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void addEventListener(String type, EventListener listener, [bool useCapture]) native;
 
   bool dispatchEvent(_EventJs evt) native;
 
-  void removeEventListener(String type, EventListener listener, [bool useCapture = null]) native;
+  void removeEventListener(String type, EventListener listener, [bool useCapture]) native;
 }
 
 class _XMLSerializerJs extends _DOMTypeJs implements XMLSerializer native "*XMLSerializer" {
 
   String serializeToString(_NodeJs node) native;
 }
 
 class _XPathEvaluatorJs extends _DOMTypeJs implements XPathEvaluator native "*XPathEvaluator" {
 
   _XPathExpressionJs createExpression(String expression, _XPathNSResolverJs resolver) native;
@@ skipping 85 matching lines @@
 
   _DocumentJs transformToDocument(_NodeJs source) native;
 
   _DocumentFragmentJs transformToFragment(_NodeJs source, _DocumentJs docVal) native;
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _BlobFactoryProvider {
-  factory Blob(List blobParts, [String type = null, String endings = null]) native
+  factory Blob(List blobParts, [String type, String endings]) native
       '''return new Blob(blobParts, type, endings);''';
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _DOMParserFactoryProvider {
   factory DOMParser() native
       '''return new DOMParser();''';
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _DOMURLFactoryProvider {
   factory DOMURL() native
       '''return new DOMURL();''';
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _DataViewFactoryProvider {
-  factory DataView(ArrayBuffer buffer, [int byteOffset = null, int byteLength = null]) native
+  factory DataView(ArrayBuffer buffer, [int byteOffset, int byteLength]) native
       '''return new DataView(buffer, byteOffset, byteLength);''';
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _DeprecatedPeerConnectionFactoryProvider {
   factory DeprecatedPeerConnection(String serverConfiguration, SignalingCallback signalingCallback) native
       '''return new DeprecatedPeerConnection(serverConfiguration, signalingCallback);''';
 }
@@ skipping 78 matching lines @@
 
 class _MessageChannelFactoryProvider {
   factory MessageChannel() native
       '''return new MessageChannel();''';
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _NotificationFactoryProvider {
-  factory Notification(String title, [Map options = null]) native
+  factory Notification(String title, [Map options]) native
       '''return new Notification(title, options);''';
 }
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 class _PeerConnection00FactoryProvider {
   factory PeerConnection00(String serverConfiguration, IceCallback iceCallback) native
       '''return new PeerConnection00(serverConfiguration, iceCallback);''';
 }
@@ skipping 13183 matching lines @@
     if (length < 0) throw new IllegalArgumentException('length');
     if (start < 0) throw new IndexOutOfRangeException(start);
     int end = start + length;
     if (end > a.length) throw new IndexOutOfRangeException(end);
     for (int i = start; i < end; i++) {
       accumulator.add(a[i]);
     }
     return accumulator;
   }
 }