Implement a source for remote video tracks.

content/renderer/media/media_stream_video_source.h

Index: content/renderer/media/media_stream_video_source.h
diff --git a/content/renderer/media/media_stream_video_source.h b/content/renderer/media/media_stream_video_source.h
index 1b9bad51d79f6ba32cd08cd401cabe8d4fa7e3e0..8c2b4e9025c97d49232f815bfc07435866502848 100644
--- a/content/renderer/media/media_stream_video_source.h
+++ b/content/renderer/media/media_stream_video_source.h
@@ -64,7 +64,7 @@ class CONTENT_EXPORT MediaStreamVideoSource
   // interface of this class.
   // This creates a VideoSourceInterface implementation if it does not already
   // exist.
-  webrtc::VideoSourceInterface* GetAdapter();
+  virtual webrtc::VideoSourceInterface* GetAdapter();
 
   // Constraint keys used by a video source.
   // Specified by draft-alvestrand-constraints-resolution-00b
@@ -118,6 +118,15 @@ class CONTENT_EXPORT MediaStreamVideoSource
   // method has been called, MediaStreamVideoSource may be deleted.
   virtual void StopSourceImpl() = 0;
 
+  enum State {
+      NEW,
+      RETRIEVING_CAPABILITIES,
+      STARTING,
+      STARTED,
+      ENDED
+  };
+  State GetState() const { return state_; }

[Jói, 2014/03/17 22:00:40]

Our naming conventions would typically name this method state() since it is a
simple getter.

[perkj_chrome, 2014/03/19 16:34:48]

Done.

+
  private:
   // Creates a webrtc::VideoSourceInterface used by libjingle.
   void InitAdapter();
@@ -138,13 +147,6 @@ class CONTENT_EXPORT MediaStreamVideoSource
   // AddTrack match the format that was used to start the device.
   void FinalizeAddTrack();
 
-  enum State {
-    NEW,
-    RETRIEVING_CAPABILITIES,
-    STARTING,
-    STARTED,
-    ENDED
-  };
   State state_;
 
   media::VideoCaptureFormat current_format_;