Deliver video frames on libjingle worker thread to WebRtcVideoCapturerAdapter.

content/renderer/media/mock_media_stream_dependency_factory.cc

Index: content/renderer/media/mock_media_stream_dependency_factory.cc
diff --git a/content/renderer/media/mock_media_stream_dependency_factory.cc b/content/renderer/media/mock_media_stream_dependency_factory.cc
index 9816113d14686bc726a36edfa894366a48caf8e5..c86a6c562799aed6298ad329188211f2e3c7b785 100644
--- a/content/renderer/media/mock_media_stream_dependency_factory.cc
+++ b/content/renderer/media/mock_media_stream_dependency_factory.cc
@@ -124,8 +124,10 @@ MockMediaStream::~MockMediaStream() {}
 
 class MockRtcVideoCapturer : public WebRtcVideoCapturerAdapter {
  public:
-  explicit MockRtcVideoCapturer(bool is_screencast)
-      : WebRtcVideoCapturerAdapter(is_screencast),
+  MockRtcVideoCapturer(
+      const scoped_refptr<base::MessageLoopProxy>& worker_thread_proxy,
+      bool is_screencast)
+      : WebRtcVideoCapturerAdapter(worker_thread_proxy, is_screencast),
         number_of_capturered_frames_(0),
         width_(0),
         height_(0) {
@@ -457,7 +459,8 @@ MockMediaStreamDependencyFactory::CreateLocalAudioSource(
 WebRtcVideoCapturerAdapter*
 MockMediaStreamDependencyFactory::CreateVideoCapturer(
     bool is_screen_capture) {
-  return new MockRtcVideoCapturer(is_screen_capture);
+  return new MockRtcVideoCapturer(GetWebRtcWorkerThread(),
+                                  is_screen_capture);
 }
 
 scoped_refptr<webrtc::VideoSourceInterface>