Revert of Removed unused cricket::VideoCapturer methods

webrtc/api/androidvideocapturer.cc

Index: webrtc/api/androidvideocapturer.cc
diff --git a/webrtc/api/androidvideocapturer.cc b/webrtc/api/androidvideocapturer.cc
index db942898383a3353d4523f2bec12117644137a10..a24d55c168e03f1fded01d02224babf7879508e6 100644
--- a/webrtc/api/androidvideocapturer.cc
+++ b/webrtc/api/androidvideocapturer.cc
@@ -152,7 +152,7 @@
 
   delegate_->Stop();
   current_state_ = cricket::CS_STOPPED;
-  SetCaptureState(current_state_);
+  SignalStateChange(this, current_state_);
 }
 
 bool AndroidVideoCapturer::IsRunning() {
@@ -173,7 +173,11 @@
   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(