Make dart:dom implementation types private so they don't muddle the docs.

client/dom/generated/src/frog/HTMLMediaElement.dart

Index: client/dom/generated/src/frog/HTMLMediaElement.dart
diff --git a/client/dom/generated/src/frog/HTMLMediaElement.dart b/client/dom/generated/src/frog/HTMLMediaElement.dart
index 92dea75a1f75092545ac65082d9514ec44d2f188..476a3208aa1ef26fc75ca91584eced446dd9f776 100644
--- a/client/dom/generated/src/frog/HTMLMediaElement.dart
+++ b/client/dom/generated/src/frog/HTMLMediaElement.dart
@@ -1,5 +1,5 @@
 
-class HTMLMediaElementJs extends HTMLElementJs implements HTMLMediaElement native "*HTMLMediaElement" {
+class _HTMLMediaElementJs extends _HTMLElementJs implements HTMLMediaElement native "*HTMLMediaElement" {
 
   static final int EOS_DECODE_ERR = 2;
 
@@ -35,11 +35,11 @@ class HTMLMediaElementJs extends HTMLElementJs implements HTMLMediaElement nativ
 
   void set autoplay(bool value) native "this.autoplay = value;";
 
-  TimeRangesJs get buffered() native "return this.buffered;";
+  _TimeRangesJs get buffered() native "return this.buffered;";
 
-  MediaControllerJs get controller() native "return this.controller;";
+  _MediaControllerJs get controller() native "return this.controller;";
 
-  void set controller(MediaControllerJs value) native "this.controller = value;";
+  void set controller(_MediaControllerJs value) native "this.controller = value;";
 
   bool get controls() native "return this.controls;";
 
@@ -63,7 +63,7 @@ class HTMLMediaElementJs extends HTMLElementJs implements HTMLMediaElement nativ
 
   bool get ended() native "return this.ended;";
 
-  MediaErrorJs get error() native "return this.error;";
+  _MediaErrorJs get error() native "return this.error;";
 
   num get initialTime() native "return this.initialTime;";
 
@@ -87,7 +87,7 @@ class HTMLMediaElementJs extends HTMLElementJs implements HTMLMediaElement nativ
 
   void set playbackRate(num value) native "this.playbackRate = value;";
 
-  TimeRangesJs get played() native "return this.played;";
+  _TimeRangesJs get played() native "return this.played;";
 
   String get preload() native "return this.preload;";
 
@@ -95,7 +95,7 @@ class HTMLMediaElementJs extends HTMLElementJs implements HTMLMediaElement nativ
 
   int get readyState() native "return this.readyState;";
 
-  TimeRangesJs get seekable() native "return this.seekable;";
+  _TimeRangesJs get seekable() native "return this.seekable;";
 
   bool get seeking() native "return this.seeking;";
 
@@ -105,7 +105,7 @@ class HTMLMediaElementJs extends HTMLElementJs implements HTMLMediaElement nativ
 
   num get startTime() native "return this.startTime;";
 
-  TextTrackListJs get textTracks() native "return this.textTracks;";
+  _TextTrackListJs get textTracks() native "return this.textTracks;";
 
   num get volume() native "return this.volume;";
 
@@ -129,7 +129,7 @@ class HTMLMediaElementJs extends HTMLElementJs implements HTMLMediaElement nativ
 
   int get webkitVideoDecodedByteCount() native "return this.webkitVideoDecodedByteCount;";
 
-  TextTrackJs addTrack(String kind, [String label = null, String language = null]) native;
+  _TextTrackJs addTrack(String kind, [String label = null, String language = null]) native;
 
   String canPlayType(String type) native;
 
@@ -139,7 +139,7 @@ class HTMLMediaElementJs extends HTMLElementJs implements HTMLMediaElement nativ
 
   void play() native;
 
-  void webkitSourceAppend(Uint8ArrayJs data) native;
+  void webkitSourceAppend(_Uint8ArrayJs data) native;
 
   void webkitSourceEndOfStream(int status) native;
 }