Replace SetCapturer and SetCaptureDevice by SetSource.

webrtc/media/base/videocapturer.cc

Index: webrtc/media/base/videocapturer.cc
diff --git a/webrtc/media/base/videocapturer.cc b/webrtc/media/base/videocapturer.cc
index a98f2f547ffd486a0d77084ce25f828338d2d54a..8ad4964a809542c8a93df7f5a5d7e8a275d23a27 100644
--- a/webrtc/media/base/videocapturer.cc
+++ b/webrtc/media/base/videocapturer.cc
@@ -183,11 +183,6 @@ void VideoCapturer::set_frame_factory(VideoFrameFactory* frame_factory) {
   }
 }
 
-void VideoCapturer::GetStats(VideoFormat* last_captured_frame_format) {
-  rtc::CritScope cs(&frame_stats_crit_);
-  *last_captured_frame_format = last_captured_frame_format_;
-}
-
 void VideoCapturer::RemoveSink(
     rtc::VideoSinkInterface<cricket::VideoFrame>* sink) {
   RTC_DCHECK(thread_checker_.CalledOnValidThread());