Uncomment IDL fragments which we used to fail to parse.

Source/WebCore/html/HTMLMediaElement.idl

 /*
  * Copyright (C) 2007, 2010, 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 81 matching lines @@
     readonly attribute [Conditional=MEDIA_STATISTICS] unsigned long webkitVideoDecodedByteCount;
 
 #if defined(ENABLE_MEDIA_SOURCE) && ENABLE_MEDIA_SOURCE
     // URL passed to src attribute to enable the media source logic.
     readonly attribute [V8EnabledAtRuntime=webkitMediaSource, URL] DOMString webkitMediaSourceURL;
 
     // Appends media to to the source.
     [V8EnabledAtRuntime=webkitMediaSource] void webkitSourceAppend(in Uint8Array data) raises (DOMException);
 
     // Signals the end of stream.
-// FIXME(antonm)
-#if 0
     [V8EnabledAtRuntime=webkitMediaSource] const unsigned short EOS_NO_ERROR = 0; // End of stream reached w/o error.

[sra1, 2012/03/07 18:42:31]

The WekBit source seems to use const [ExtAttrs]
Why is this [ExtAttrs] const ?

     [V8EnabledAtRuntime=webkitMediaSource] const unsigned short EOS_NETWORK_ERR = 1; // A network error triggered end of stream.
     [V8EnabledAtRuntime=webkitMediaSource] const unsigned short EOS_DECODE_ERR = 2; // A decode error triggered end of stream.
-#endif
     [V8EnabledAtRuntime=webkitMediaSource] void webkitSourceEndOfStream(in unsigned short status) raises (DOMException);
 
     // Indicates the current state of the media source.
-// FIXME(antonm)
-#if 0
     [V8EnabledAtRuntime=webkitMediaSource] const unsigned short SOURCE_CLOSED = 0;
     [V8EnabledAtRuntime=webkitMediaSource] const unsigned short SOURCE_OPEN = 1;
     [V8EnabledAtRuntime=webkitMediaSource] const unsigned short SOURCE_ENDED = 2;
-#endif
     readonly attribute [V8EnabledAtRuntime=webkitMediaSource] unsigned short webkitSourceState;
 #endif
 
 #if defined(ENABLE_VIDEO_TRACK) && ENABLE_VIDEO_TRACK
     [V8EnabledAtRuntime=webkitVideoTrack] TextTrack addTextTrack(in DOMString kind, in [Optional] DOMString label, in [Optional] DOMString language)
         raises (DOMException);
     readonly attribute [V8EnabledAtRuntime=webkitVideoTrack] TextTrackList textTracks;
 #endif
 
     attribute [Reflect, TreatNullAs=NullString] DOMString mediaGroup;
     attribute [CustomSetter] MediaController controller;
 };
 }