Add Audio support in Chromoting host when using WebRTC.

remoting/protocol/webrtc_video_stream.h

 // Copyright 2015 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_VIDEO_STREAM_H_
 #define REMOTING_PROTOCOL_WEBRTC_VIDEO_STREAM_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 23 matching lines @@
 class WebrtcTransport;
 class WebrtcVideoCapturerAdapter;
 
 class WebrtcVideoStream : public VideoStream,
                           public webrtc::DesktopCapturer::Callback,
                           public HostVideoStatsDispatcher::EventHandler {
  public:
   WebrtcVideoStream();
   ~WebrtcVideoStream() override;
 
-  bool Start(std::unique_ptr<webrtc::DesktopCapturer> desktop_capturer,
+  void Start(std::unique_ptr<webrtc::DesktopCapturer> desktop_capturer,
              WebrtcTransport* webrtc_transport,
              scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner);
 
   // VideoStream interface.
   void Pause(bool pause) override;
   void OnInputEventReceived(int64_t event_timestamp) override;
   void SetLosslessEncode(bool want_lossless) override;
   void SetLosslessColor(bool want_lossless) override;
   void SetObserver(Observer* observer) override;
 
@@ skipping 55 matching lines @@
 
   base::WeakPtrFactory<WebrtcVideoStream> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebrtcVideoStream);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_WEBRTC_VIDEO_STREAM_H_