Adding flag for turning on the Media Source API

webkit/glue/webmediaplayer_impl.h

Index: webkit/glue/webmediaplayer_impl.h
diff --git a/webkit/glue/webmediaplayer_impl.h b/webkit/glue/webmediaplayer_impl.h
index ea19d583524a5d58bf4691cee787cc0e738efea0..217a22fec50e25494b87851c0e1cf875e60269b3 100644
--- a/webkit/glue/webmediaplayer_impl.h
+++ b/webkit/glue/webmediaplayer_impl.h
@@ -179,10 +179,8 @@ class WebMediaPlayerImpl
   virtual WebKit::WebVideoFrame* getCurrentFrame();
   virtual void putCurrentFrame(WebKit::WebVideoFrame* web_video_frame);
 
-  // TODO(acolwell): Uncomment once WebKit changes are checked in.
-  // https://bugs.webkit.org/show_bug.cgi?id=64731
-  //virtual bool sourceAppend(const unsigned char* data, unsigned length);
-  //virtual void sourceEndOfStream(EndOfStreamStatus status);
+  virtual bool sourceAppend(const unsigned char* data, unsigned length);
+  virtual void sourceEndOfStream(EndOfStreamStatus status);
 
   // As we are closing the tab or even the browser, |main_loop_| is destroyed
   // even before this object gets destructed, so we need to know when