Add InputEventTimestampSource interface.

remoting/protocol/video_stream.h

Index: remoting/protocol/video_stream.h
diff --git a/remoting/protocol/video_stream.h b/remoting/protocol/video_stream.h
index 06045b2c31e087cabc6438fb5b4c4ebf21e7b396..82bd6b4c5928f02a1df72e9946ed322b234b7e64 100644
--- a/remoting/protocol/video_stream.h
+++ b/remoting/protocol/video_stream.h
@@ -10,6 +10,7 @@
 #include <cstdint>
 
 #include "base/callback_forward.h"
+#include "remoting/protocol/input_event_timestamps.h"
 
 namespace webrtc {
 class DesktopSize;
@@ -33,13 +34,14 @@ class VideoStream {
   VideoStream() {}
   virtual ~VideoStream() {}
 
+  // Sets event timestamps source to be used for the video stream.
+  virtual void SetEventTimestampSource(
+      scoped_refptr<InputEventTimestampSource> event_timestamp_source) = 0;
+
   // Pauses or resumes scheduling of frame captures. Pausing/resuming captures
   // only affects capture scheduling and does not stop/start the capturer.
   virtual void Pause(bool pause) = 0;
 
-  // Should be called whenever an input event is received.
-  virtual void OnInputEventReceived(int64_t event_timestamp) = 0;
-
   // Sets whether the video encoder should be requested to encode losslessly,
   // or to use a lossless color space (typically requiring higher bandwidth).
   virtual void SetLosslessEncode(bool want_lossless) = 0;