Revert of Removed unused cricket::VideoCapturer methods

webrtc/api/androidvideocapturer.cc

 /*
  *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 134 matching lines @@
 
 void AndroidVideoCapturer::Stop() {
   LOG(LS_INFO) << " AndroidVideoCapturer::Stop ";
   RTC_CHECK(thread_checker_.CalledOnValidThread());
   RTC_CHECK(running_);
   running_ = false;
   SetCaptureFormat(NULL);
 
   delegate_->Stop();
   current_state_ = cricket::CS_STOPPED;
-  SetCaptureState(current_state_);
+  SignalStateChange(this, current_state_);
 }
 
 bool AndroidVideoCapturer::IsRunning() {
   RTC_CHECK(thread_checker_.CalledOnValidThread());
   return running_;
 }
 
 bool AndroidVideoCapturer::GetPreferredFourccs(std::vector<uint32_t>* fourccs) {
   RTC_CHECK(thread_checker_.CalledOnValidThread());
   fourccs->push_back(cricket::FOURCC_YV12);
   return true;
 }
 
 void AndroidVideoCapturer::OnCapturerStarted(bool success) {
   RTC_CHECK(thread_checker_.CalledOnValidThread());
   cricket::CaptureState new_state =
       success ? cricket::CS_RUNNING : cricket::CS_FAILED;
   if (new_state == current_state_)
     return;
   current_state_ = new_state;
-  SetCaptureState(new_state);
+
+  // TODO(perkj): SetCaptureState can not be used since it posts to |thread_|.
+  // But |thread_ | is currently just the thread that happened to create the
+  // cricket::VideoCapturer.
+  SignalStateChange(this, new_state);
 }
 
 void AndroidVideoCapturer::OnIncomingFrame(
     const rtc::scoped_refptr<webrtc::VideoFrameBuffer>& buffer,
     int rotation,
     int64_t time_stamp) {
   RTC_CHECK(thread_checker_.CalledOnValidThread());
   frame_factory_->UpdateCapturedFrame(buffer, rotation, time_stamp);
   SignalFrameCaptured(this, frame_factory_->GetCapturedFrame());
   frame_factory_->ClearCapturedFrame();
@@ skipping 10 matching lines @@
 
 bool AndroidVideoCapturer::GetBestCaptureFormat(
     const cricket::VideoFormat& desired,
     cricket::VideoFormat* best_format) {
   // Delegate this choice to VideoCapturer.startCapture().
   *best_format = desired;
   return true;
 }
 
 }  // namespace webrtc