Pass a TimeTicks along video capture pipeline to represent capture time

content/renderer/media/mock_media_stream_video_source.cc

Index: content/renderer/media/mock_media_stream_video_source.cc
diff --git a/content/renderer/media/mock_media_stream_video_source.cc b/content/renderer/media/mock_media_stream_video_source.cc
index 12bddb4564bac1e8ddb46ddbf40bb629f6ae646e..acd6f25590cc89cb5a2669dc6f6e64f10bc5aebb 100644
--- a/content/renderer/media/mock_media_stream_video_source.cc
+++ b/content/renderer/media/mock_media_stream_video_source.cc
@@ -77,15 +77,16 @@ void MockMediaStreamVideoSource::DeliverVideoFrame(
       FROM_HERE,
       base::Bind(&MockMediaStreamVideoSource::DeliverVideoFrameOnIO,
                  base::Unretained(this), frame, params_.requested_format,
-                 frame_callback_));
+                 base::TimeTicks(), frame_callback_));
 }
 
 void MockMediaStreamVideoSource::DeliverVideoFrameOnIO(
     const scoped_refptr<media::VideoFrame>& frame,
     media::VideoCaptureFormat format,
+    const base::TimeTicks& start_ticks,
     const VideoCaptureDeliverFrameCB& frame_callback) {
   DCHECK(io_message_loop()->BelongsToCurrentThread());
-  frame_callback.Run(frame, format);
+  frame_callback.Run(frame, format, start_ticks);
 }
 
 }  // namespace content