Fix AudioPump to pause the stream when the network is congested.

remoting/codec/audio_encoder_verbatim.h

 // Copyright (c) 2012 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_CODEC_AUDIO_ENCODER_VERBATIM_H_
 #define REMOTING_CODEC_AUDIO_ENCODER_VERBATIM_H_
 
 #include "remoting/codec/audio_encoder.h"
 
 namespace remoting {
 
 class AudioPacket;
 
 class AudioEncoderVerbatim : public AudioEncoder {
  public:
   AudioEncoderVerbatim();
   ~AudioEncoderVerbatim() override;
 
   // AudioEncoder implementation.
   scoped_ptr<AudioPacket> Encode(scoped_ptr<AudioPacket> packet) override;
+  int GetBitrate() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(AudioEncoderVerbatim);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CODEC_AUDIO_ENCODER_VERBATIM_H_