Add WebKit prefix to MediaSource,SourceBuffer, and SourceBufferList objects.

Source/core/page/DOMWindow.idl

Index: Source/core/page/DOMWindow.idl
diff --git a/Source/core/page/DOMWindow.idl b/Source/core/page/DOMWindow.idl
index d04ac7aba58fa1f8c4881f2c5f19d625e1d8618c..789c09e64ac80f934ce8135dce7c0196212e037e 100644
--- a/Source/core/page/DOMWindow.idl
+++ b/Source/core/page/DOMWindow.idl
@@ -300,6 +300,10 @@
     attribute IDBRequestConstructor webkitIDBRequest;
     attribute IDBTransactionConstructor webkitIDBTransaction;
 
+    [EnabledAtRuntime=webKitMediaSource] attribute WebKitMediaSourceConstructor WebKitMediaSource;

[eseidel, 2013/05/09 20:05:22]

I suspect this could move into a supplement these days?

+    [EnabledAtRuntime=webKitMediaSource] attribute WebKitSourceBufferConstructor WebKitSourceBuffer;
+    [EnabledAtRuntime=webKitMediaSource] attribute WebKitSourceBufferListConstructor WebKitSourceBufferList;
+
     // Constructors enabled at runtime but whose interface does not have EnabledAtRuntime
     // extended attribute.
     // FIXME: Remove these.
@@ -327,12 +331,10 @@
     [EnabledAtRuntime=scriptedSpeech] attribute SpeechRecognitionErrorConstructor webkitSpeechRecognitionError;
     [EnabledAtRuntime=scriptedSpeech] attribute SpeechRecognitionEventConstructor webkitSpeechRecognitionEvent;
 
+
     // Constructors whose name does not match the interface name.
     // FIXME: Remove these once [ImplementedAs] is used and once constructor names match interface names.
     attribute ShadowRootConstructor WebKitShadowRoot;
-    [EnabledAtRuntime=mediaSource] attribute MediaSourceConstructor WebKitMediaSource;
-    [EnabledAtRuntime=mediaSource] attribute SourceBufferConstructor WebKitSourceBuffer;
-    [EnabledAtRuntime=mediaSource] attribute SourceBufferListConstructor WebKitSourceBufferList;
     [Conditional=WEB_AUDIO] attribute PannerNodeConstructor webkitAudioPannerNode;
 
     // window.toString() requires special handling in V8