Adding monitoring to a number of DOM generation scripts.

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index b9de515c68fe68ef3c44062308682311f9a21d6a..158f1aa25b01346ff0a3c235bb7f87f94f01fb49 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -11676,6 +11676,8 @@ class FileReaderSync extends NativeFieldWrapperClass1 {
 
 @DocsEditable
 @DomName('DOMFileSystem')
+@SupportedBrowser(SupportedBrowser.CHROME)
+@Experimental
 class FileSystem extends NativeFieldWrapperClass1 {
   FileSystem.internal();
 
@@ -11708,6 +11710,8 @@ typedef void FileSystemCallback(FileSystem fileSystem);
 
 @DocsEditable
 @DomName('DOMFileSystemSync')
+@SupportedBrowser(SupportedBrowser.CHROME)
+@Experimental
 class FileSystemSync extends NativeFieldWrapperClass1 {
   FileSystemSync.internal();
 
@@ -17397,10 +17401,18 @@ class MediaSource extends EventTarget {
 class MediaStream extends EventTarget {
   MediaStream.internal() : super.internal();
 
+  @DomName('MediaStream.addtrackEvent')
+  @DocsEditable
+  static const EventStreamProvider<Event> addTrackEvent = const EventStreamProvider<Event>('addtrack');
+
   @DomName('MediaStream.endedEvent')
   @DocsEditable
   static const EventStreamProvider<Event> endedEvent = const EventStreamProvider<Event>('ended');
 
+  @DomName('MediaStream.removetrackEvent')
+  @DocsEditable
+  static const EventStreamProvider<Event> removeTrackEvent = const EventStreamProvider<Event>('removetrack');
+
   @DomName('MediaStream.MediaStream')
   @DocsEditable
   factory MediaStream([stream_OR_tracks]) {
@@ -17469,10 +17481,18 @@ class MediaStream extends EventTarget {
   @DocsEditable
   void removeTrack(MediaStreamTrack track) native "MediaStream_removeTrack_Callback";
 
+  @DomName('MediaStream.onaddtrack')
+  @DocsEditable
+  Stream<Event> get onAddTrack => addTrackEvent.forTarget(this);
+
   @DomName('MediaStream.onended')
   @DocsEditable
   Stream<Event> get onEnded => endedEvent.forTarget(this);
 
+  @DomName('MediaStream.onremovetrack')
+  @DocsEditable
+  Stream<Event> get onRemoveTrack => removeTrackEvent.forTarget(this);
+
 
   /**
    * Checks if the MediaStream APIs are supported on the current platform.
@@ -20699,6 +20719,10 @@ class RtcPeerConnection extends EventTarget {
   @DocsEditable
   static const EventStreamProvider<RtcDataChannelEvent> dataChannelEvent = const EventStreamProvider<RtcDataChannelEvent>('datachannel');
 
+  @DomName('RTCPeerConnection.gatheringchangeEvent')
+  @DocsEditable
+  static const EventStreamProvider<Event> gatheringChangeEvent = const EventStreamProvider<Event>('gatheringchange');
+
   @DomName('RTCPeerConnection.icecandidateEvent')
   @DocsEditable
   static const EventStreamProvider<RtcIceCandidateEvent> iceCandidateEvent = const EventStreamProvider<RtcIceCandidateEvent>('icecandidate');
@@ -20824,6 +20848,10 @@ class RtcPeerConnection extends EventTarget {
   @DocsEditable
   Stream<RtcDataChannelEvent> get onDataChannel => dataChannelEvent.forTarget(this);
 
+  @DomName('RTCPeerConnection.ongatheringchange')
+  @DocsEditable
+  Stream<Event> get onGatheringChange => gatheringChangeEvent.forTarget(this);
+
   @DomName('RTCPeerConnection.onicecandidate')
   @DocsEditable
   Stream<RtcIceCandidateEvent> get onIceCandidate => iceCandidateEvent.forTarget(this);
@@ -28572,10 +28600,16 @@ class Window extends EventTarget implements WindowBase {
 
   @DomName('DOMWindow.webkitConvertPointFromNodeToPage')
   @DocsEditable
+  @SupportedBrowser(SupportedBrowser.CHROME)
+  @SupportedBrowser(SupportedBrowser.SAFARI)
+  @Experimental
   DomPoint convertPointFromNodeToPage(Node node, DomPoint p) native "DOMWindow_webkitConvertPointFromNodeToPage_Callback";
 
   @DomName('DOMWindow.webkitConvertPointFromPageToNode')
   @DocsEditable
+  @SupportedBrowser(SupportedBrowser.CHROME)
+  @SupportedBrowser(SupportedBrowser.SAFARI)
+  @Experimental
   DomPoint convertPointFromPageToNode(Node node, DomPoint p) native "DOMWindow_webkitConvertPointFromPageToNode_Callback";
 
   @DomName('DOMWindow.webkitRequestFileSystem')