Revert "Conversions between Dart code and DOM code."

lib/html/src/dart2js_Conversions.dart

-// 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.
-
-// Conversions for IDBKey.
-//
-// Per http://www.w3.org/TR/IndexedDB/#key-construct
-//
-// "A value is said to be a valid key if it is one of the following types: Array
-// JavaScript objects [ECMA-262], DOMString [WEBIDL], Date [ECMA-262] or float
-// [WEBIDL]. However Arrays are only valid keys if every item in the array is
-// defined and is a valid key (i.e. sparse arrays can not be valid keys) and if
-// the Array doesn't directly or indirectly contain itself. Any non-numeric
-// properties are ignored, and thus does not affect whether the Array is a valid
-// key. Additionally, if the value is of type float, it is only a valid key if
-// it is not NaN, and if the value is of type Date it is only a valid key if its
-// [[PrimitiveValue]] internal property, as defined by [ECMA-262], is not NaN."
-
-// What is required is to ensure that an Lists in the key are actually
-// JavaScript arrays, and any Dates are JavaScript Dates.
-
-/**
- * Converts a native IDBKey into a Dart object.
- *
- * May return the original input.  May mutate the original input (but will be
- * idempotent if mutation occurs).  It is assumed that this conversion happens
- * on native IDBKeys on all paths that return IDBKeys from native DOM calls.
- *
- * If necessary, JavaScript Dates are converted into Dart Dates.
- */
-_convertNativeToDart_IDBKey(nativeKey) {
-  // TODO: Implement.
-  // TODO: Cache conversion somewhere.
-  return nativeKey;
-}
-
-/**
- * Converts a Dart object into a valid IDBKey.
- *
- * May return the original input.  Does not mutate input.
- *
- * If necessary, [dartKey] may be copied to ensure all lists are converted into
- * JavaScript Arrays and Dart Dates into JavaScript Dates.
- */
-
-_convertDartToNative_IDBKey(dartKey) {
-  // TODO: Implement.
-  // TODO: Cache conversion on object.
-  return dartKey;
-}
-
-
-// Conversions for ImageData
-//
-// On Firefox, the returned ImageData is a plain object.
-
-class _TypedImageData implements ImageData {
-  final Uint8ClampedArray data;
-  final int height;
-  final int width;
-
-  _TypedImageData(this.data, this.height, this.width);
-}
-
-ImageData _convertNativeToDart_ImageData(nativeImageData) {
-  if (nativeImageData is ImageData) return nativeImageData;
-
-  // On Firefox the above test fails because imagedata is a plain object.
-  // So we create a _TypedImageData.
-
-  return new _TypedImageData(
-      JS('var', '#.data', nativeImageData),
-      JS('var', '#.height', nativeImageData),
-      JS('var', '#.width', nativeImageData));
-}
-
-// We can get rid of this conversion if _TypedImageData implements the fields
-// with native names.
-_convertDartToNative_ImageData(ImageData imageData) {
-  if (imageData is _ImageDataImpl) return imageData;
-  return JS('Object', '{data: #, height: #, width: #}',
-            imageData.data, imageData.height, imageData.width);
-}
-
-
-/// Converts a JavaScript object with properties into a Dart Map.
-Map _convertNativeToDart_Dictionary(object) {
-  // TODO: Implement.
-  return object;
-}
-
-/// Converts a Dart map into a JavaScript object with properties.
-_convertDartToNative_Dictionary(Map dict) {
-  // TODO: Implement.
-  return dict;
-}
-
-
-/**
- * Ensures that the input is a JavaScript Array.
- *
- * Creates a new JavaScript array if necessary, otherwise returns the original.
- */
-List _convertDartToNative_StringArray(List<String> input) {
-  return input;
-}