Pass a TimeTicks along video capture pipeline to represent capture time

content/renderer/media/mock_media_stream_video_source.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/mock_media_stream_video_source.h"
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 
@@ skipping 59 matching lines @@
 void MockMediaStreamVideoSource::StopSourceImpl() {
 }
 
 void MockMediaStreamVideoSource::DeliverVideoFrame(
     const scoped_refptr<media::VideoFrame>& frame) {
   DCHECK(!frame_callback_.is_null());
   io_message_loop()->PostTask(
       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