Cast: deliver video frames on the IO thread

content/renderer/media/webrtc/media_stream_remote_video_source_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/child/child_process.h"
 #include "content/renderer/media/media_stream_video_track.h"
 #include "content/renderer/media/mock_media_stream_dependency_factory.h"
@@ skipping 90 matching lines @@
   blink::WebMediaStreamSource webkit_source_;
   int number_of_successful_constraints_applied_;
   int number_of_failed_constraints_applied_;
 };
 
 TEST_F(MediaStreamRemoteVideoSourceTest, StartTrack) {
   scoped_ptr<MediaStreamVideoTrack> track(CreateTrack());
   EXPECT_EQ(1, NumberOfSuccessConstraintsCallbacks());
 
   MockMediaStreamVideoSink sink;
-  track->AddSink(&sink);
-
-
-
+  track->AddSink(&sink, sink.GetDeliverFrameCB());
   base::RunLoop run_loop;
   base::Closure quit_closure = run_loop.QuitClosure();
   EXPECT_CALL(sink, OnVideoFrame()).WillOnce(
       RunClosure(quit_closure));
   cricket::WebRtcVideoFrame webrtc_frame;
   webrtc_frame.InitToBlack(320, 240, 1, 1, 0, 1);
   source()->RenderInterfaceForTest()->RenderFrame(&webrtc_frame);
   run_loop.Run();
 
   EXPECT_EQ(1, sink.number_of_frames());
   track->RemoveSink(&sink);
 }
 
 TEST_F(MediaStreamRemoteVideoSourceTest, RemoteTrackStop) {
   scoped_ptr<MediaStreamVideoTrack> track(CreateTrack());
 
   MockMediaStreamVideoSink sink;
-  track->AddSink(&sink);
-
+  track->AddSink(&sink, sink.GetDeliverFrameCB());
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateLive, sink.state());
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateLive,
             webkit_source().readyState());
   StopWebRtcTrack();
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateEnded,
             webkit_source().readyState());
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateEnded, sink.state());
 
   track->RemoveSink(&sink);
 }
 
 }  // namespace content