VideoCapturerAndroid: Add possibility to request a new resolution from the video adapter.

talk/app/webrtc/androidvideocapturer.h

 /*
  * libjingle
  * Copyright 2015 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 56 matching lines @@
 
   // Called from JNI when the capturer has been started.
   void OnCapturerStarted(bool success);
 
   // Called from JNI when a new frame has been captured.
   void OnIncomingFrame(void* video_frame,
                        int length,
                        int rotation,
                        int64 time_stamp);
 
+  // Called from JNI to request a new video format.
+  void OnOutputFormatRequest(int width, int height, int fps);
+
   AndroidVideoCapturerDelegate* delegate() { return delegate_.get(); }
 
  private:
   // cricket::VideoCapturer implementation.
   // Video frames will be delivered using
   // cricket::VideoCapturer::SignalFrameCaptured on the thread that calls Start.
   cricket::CaptureState Start(
       const cricket::VideoFormat& capture_format) override;
   void Stop() override;
   bool IsRunning() override;
   bool IsScreencast() const override { return false; }
   bool GetPreferredFourccs(std::vector<uint32>* fourccs) override;
 
   bool running_;
   rtc::scoped_refptr<AndroidVideoCapturerDelegate> delegate_;
 
   rtc::ThreadChecker thread_checker_;
 
   class FrameFactory;
   FrameFactory* frame_factory_;  // Owned by cricket::VideoCapturer.
 
   cricket::CaptureState current_state_;
 };
 
 }  // namespace webrtc
 
 #endif  // TALK_APP_WEBRTC_ANDROIDVIDEOCAPTURER_H_