Add InputEventTimestampSource interface.

remoting/protocol/webrtc_video_stream.h

Index: remoting/protocol/webrtc_video_stream.h
diff --git a/remoting/protocol/webrtc_video_stream.h b/remoting/protocol/webrtc_video_stream.h
index fc0177083330d8eb128c276bcd855807d886dd1c..4f5b1a82cfa808791e634a6cd9f06ba647f7065d 100644
--- a/remoting/protocol/webrtc_video_stream.h
+++ b/remoting/protocol/webrtc_video_stream.h
@@ -46,8 +46,9 @@ class WebrtcVideoStream : public VideoStream,
              scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner);
 
   // VideoStream interface.
+  void SetEventTimestampsSource(scoped_refptr<InputEventTimestampsSource>
+                                    event_timestamps_source) override;
   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;
@@ -87,14 +88,13 @@ class WebrtcVideoStream : public VideoStream,
   // Used to encode captured frames. Always accessed on the encode thread.
   std::unique_ptr<WebrtcVideoEncoder> encoder_;
 
+  scoped_refptr<InputEventTimestampsSource> event_timestamps_source_;
+
   scoped_refptr<webrtc::PeerConnectionInterface> peer_connection_;
   scoped_refptr<webrtc::MediaStreamInterface> stream_;
 
   HostVideoStatsDispatcher video_stats_dispatcher_;
 
-  // Timestamps for the frame to be captured next.
-  std::unique_ptr<FrameTimestamps> next_frame_timestamps_;
-
   // Timestamps for the frame that's being captured.
   std::unique_ptr<FrameTimestamps> captured_frame_timestamps_;