Revert 262050 "Implement a source for remote video tracks."

trunk/src/content/renderer/media/media_stream_video_source.h

Index: trunk/src/content/renderer/media/media_stream_video_source.h
===================================================================
--- trunk/src/content/renderer/media/media_stream_video_source.h	(revision 262817)
+++ trunk/src/content/renderer/media/media_stream_video_source.h	(working copy)
@@ -64,7 +64,7 @@
   // interface of this class.
   // This creates a VideoSourceInterface implementation if it does not already
   // exist.
-  virtual webrtc::VideoSourceInterface* GetAdapter();
+  webrtc::VideoSourceInterface* GetAdapter();
 
   // Return true if |name| is a constraint supported by MediaStreamVideoSource.
   static bool IsConstraintSupported(const std::string& name);
@@ -130,7 +130,7 @@
     STARTED,
     ENDED
   };
-  State state() const { return state_; }
+  State state() { return state_; }
 
  private:
   // Creates a webrtc::VideoSourceInterface used by libjingle.