Added VideoTrackInterface::GetSink method, for use by VideoRtpReceiver. Get rid of FrameInput.

talk/app/webrtc/rtpsenderreceiver_unittest.cc

Index: talk/app/webrtc/rtpsenderreceiver_unittest.cc
diff --git a/talk/app/webrtc/rtpsenderreceiver_unittest.cc b/talk/app/webrtc/rtpsenderreceiver_unittest.cc
index 3df9821c9adedf3e4d0e50049808ab5b0add26d7..2f8367fafabe06ccea4db120ce07d107aa13a9fb 100644
--- a/talk/app/webrtc/rtpsenderreceiver_unittest.cc
+++ b/talk/app/webrtc/rtpsenderreceiver_unittest.cc
@@ -88,7 +88,7 @@ class MockVideoProvider : public VideoProviderInterface {
   MOCK_METHOD3(SetVideoPlayout,
                void(uint32_t ssrc,
                     bool enable,
-                    cricket::VideoRenderer* renderer));
+                    rtc::VideoSinkInterface<cricket::VideoFrame>* sink));
   MOCK_METHOD3(SetVideoSend,
                void(uint32_t ssrc,
                     bool enable,
@@ -181,7 +181,7 @@ class RtpSenderReceiverTest : public testing::Test {
     AddVideoTrack(true);
     EXPECT_CALL(video_provider_,
                 SetVideoPlayout(kVideoSsrc, true,
-                                video_track_->GetSource()->FrameInput()));
+                                video_track_->GetSink()));
     video_rtp_receiver_ = new VideoRtpReceiver(stream_->GetVideoTracks()[0],
                                                kVideoSsrc, &video_provider_);
   }