Pass a TimeTicks along video capture pipeline to represent capture time

content/renderer/media/video_frame_deliverer.h

Index: content/renderer/media/video_frame_deliverer.h
diff --git a/content/renderer/media/video_frame_deliverer.h b/content/renderer/media/video_frame_deliverer.h
index e8819b4821fd33330d13ae2fa24361d76f105018..c2b0daa8fba5f5b9f6de98e9ea8bbb09a443f49a 100644
--- a/content/renderer/media/video_frame_deliverer.h
+++ b/content/renderer/media/video_frame_deliverer.h
@@ -37,11 +37,12 @@ class VideoFrameDeliverer
   // Must be called on the main render thread.
   void RemoveCallback(void* id);
 
-  // Triggers all registered callbacks with |frame| and |format| as parameters.
-  // Must be called on the IO-thread.
+  // Triggers all registered callbacks with |frame|, |format| and |start_ticks|
+  // as parameters. Must be called on the IO-thread.
   virtual void DeliverFrameOnIO(
       const scoped_refptr<media::VideoFrame>& frame,
-      const media::VideoCaptureFormat& format);
+      const media::VideoCaptureFormat& format,
+      const base::TimeTicks& start_ticks);
 
   const scoped_refptr<base::MessageLoopProxy>& io_message_loop() const {
     return io_message_loop_;