Add remoting::protocol::NetworkStateObserver interface.

remoting/protocol/webrtc_frame_scheduler.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_PROTOCOL_WEBRTC_FRAME_SCHEDULER_H_
 #define REMOTING_PROTOCOL_WEBRTC_FRAME_SCHEDULER_H_
 
 #include "base/callback_forward.h"
+#include "base/memory/weak_ptr.h"
 #include "remoting/codec/webrtc_video_encoder.h"
 #include "third_party/webrtc/video_encoder.h"
 
 namespace remoting {
 namespace protocol {
 
+class VideoChannelStateObserver;
+class WebrtcDummyVideoEncoderFactory;
+
 // An abstract interface for frame schedulers, which are responsible for
 // scheduling when video frames are captured and for defining encoding
 // parameters for each frame.
 class WebrtcFrameScheduler {
  public:
   WebrtcFrameScheduler() {}
   virtual ~WebrtcFrameScheduler() {}
 
   // Starts the scheduler. |capture_callback| will be called whenever a new
   // frame should be captured.
-  virtual void Start(const base::Closure& capture_callback) = 0;
+  virtual void Start(WebrtcDummyVideoEncoderFactory* video_encoder_factory,
+                     const base::Closure& capture_callback) = 0;
 
   // Pause and resumes the scheduler.
   virtual void Pause(bool pause) = 0;
 
-  // Requests a key frame.
-  virtual void SetKeyFrameRequest() = 0;
-
-  // Sets network bitrate estimate.
-  virtual void SetTargetBitrate(int bitrate_kbps) = 0;
-
   // Called after |frame| has been captured to get encoding parameters for the
   // frame. Returns false if the frame should be dropped (e.g. when there are
   // no changed), true otherwise.
   virtual bool GetEncoderFrameParams(
       const webrtc::DesktopFrame& frame,
       WebrtcVideoEncoder::FrameParams* params_out) = 0;
 
   // Called after a frame has been encoded and passed to the sender.
   virtual void OnFrameEncoded(
       const WebrtcVideoEncoder::EncodedFrame& encoded_frame,
       const webrtc::EncodedImageCallback::Result& send_result) = 0;
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_WEBRTC_FRAME_SCHEDULER_H_