Cast: deliver video frames on the IO thread

content/renderer/media/media_stream_impl_unittest.cc

 // Copyright (c) 2012 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/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/child/child_process.h"
 #include "content/renderer/media/media_stream.h"
 #include "content/renderer/media/media_stream_impl.h"
 #include "content/renderer/media/media_stream_track.h"
 #include "content/renderer/media/mock_media_stream_dependency_factory.h"
 #include "content/renderer/media/mock_media_stream_dispatcher.h"
 #include "content/renderer/media/mock_media_stream_video_source.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/WebKit/public/platform/WebMediaStream.h"
@@ skipping 144 matching lines @@
         ms_impl_->last_created_video_source();
     if (video_source->SourceHasAttemptedToStart())
       video_source->FailToStartMockedSource();
   }
 
   void FailToCreateNextAudioCapturer() {
     dependency_factory_->FailToCreateNextAudioCapturer();
   }
 
  protected:
+  base::MessageLoop message_loop_;
   scoped_ptr<ChildProcess> child_process_;
   scoped_ptr<MockMediaStreamDispatcher> ms_dispatcher_;
   scoped_ptr<MediaStreamImplUnderTest> ms_impl_;
   scoped_ptr<MockMediaStreamDependencyFactory> dependency_factory_;
 };
 
 TEST_F(MediaStreamImplTest, GenerateMediaStream) {
   // Generate a stream with both audio and video.
   blink::WebMediaStream mixed_desc = RequestLocalMediaStream();
 }
@@ skipping 213 matching lines @@
   EXPECT_EQ(1, ms_dispatcher_->stop_audio_device_counter());
 
   blink::WebVector<blink::WebMediaStreamTrack> video_tracks;
   mixed_desc.videoTracks(video_tracks);
   MediaStreamTrack* video_track = MediaStreamTrack::GetTrack(video_tracks[0]);
   video_track->Stop();
   EXPECT_EQ(1, ms_dispatcher_->stop_video_device_counter());
 }
 
 }  // namespace content