Revert of Fix the video buffer size should take rtt into consideration

webrtc/video/video_receive_stream.h

 /*
  *  Copyright (c) 2013 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 31 matching lines @@
 class VCMJitterEstimator;
 
 namespace internal {
 
 class VideoReceiveStream : public webrtc::VideoReceiveStream,
                            public rtc::VideoSinkInterface<VideoFrame>,
                            public EncodedImageCallback,
                            public NackSender,
                            public KeyFrameRequestSender,
                            public video_coding::OnCompleteFrameCallback,
-                           public Syncable,
-                           public CallStatsObserver {
+                           public Syncable {
  public:
   VideoReceiveStream(RtpStreamReceiverControllerInterface* receiver_controller,
                      int num_cpu_cores,
                      PacketRouter* packet_router,
                      VideoReceiveStream::Config config,
                      ProcessThread* process_thread,
                      CallStats* call_stats);
   ~VideoReceiveStream() override;
 
   const Config& config() const { return config_; }
@@ skipping 34 matching lines @@
   // Implements NackSender.
   void SendNack(const std::vector<uint16_t>& sequence_numbers) override;
 
   // Implements KeyFrameRequestSender.
   void RequestKeyFrame() override;
 
   // Implements video_coding::OnCompleteFrameCallback.
   void OnCompleteFrame(
       std::unique_ptr<video_coding::FrameObject> frame) override;
 
-  // Implements CallStatsObserver::OnRttUpdate
-  void OnRttUpdate(int64_t avg_rtt_ms, int64_t max_rtt_ms) override;
-
   // Implements Syncable.
   int id() const override;
   rtc::Optional<Syncable::Info> GetInfo() const override;
   uint32_t GetPlayoutTimestamp() const override;
   void SetMinimumPlayoutDelay(int delay_ms) override;
 
  private:
   static void DecodeThreadFunction(void* ptr);
   bool Decode();
 
@@ skipping 32 matching lines @@
   // a decoding error) we require a keyframe to restart the stream.
   bool keyframe_required_ = true;
 
   // If we have successfully decoded any frame.
   bool frame_decoded_ = false;
 };
 }  // namespace internal
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIDEO_RECEIVE_STREAM_H_