Report timing frames info in GetStats.

webrtc/modules/video_coding/include/video_coding_defines.h

Index: webrtc/modules/video_coding/include/video_coding_defines.h
diff --git a/webrtc/modules/video_coding/include/video_coding_defines.h b/webrtc/modules/video_coding/include/video_coding_defines.h
index 6ed472df5e62da2b64f50a45fca810714217c891..19d38138eac02966286383b387f1e71e93fce037 100644
--- a/webrtc/modules/video_coding/include/video_coding_defines.h
+++ b/webrtc/modules/video_coding/include/video_coding_defines.h
@@ -109,6 +109,8 @@ class VCMReceiveStatisticsCallback {
                                            int min_playout_delay_ms,
                                            int render_delay_ms) = 0;
 
+  virtual void OnTimingFrameInfoUpdated(const TimingFrameInfo& info) = 0;
+
  protected:
   virtual ~VCMReceiveStatisticsCallback() {}
 };