Pass a TimeTicks along video capture pipeline to represent capture time

content/renderer/media/mock_media_stream_video_source.h

 // 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.
 
 #ifndef CONTENT_RENDERER_MEDIA_MOCK_MEDIA_STREAM_VIDEO_SOURCE_H_
 #define CONTENT_RENDERER_MEDIA_MOCK_MEDIA_STREAM_VIDEO_SOURCE_H_
 
 #include "content/renderer/media/media_stream_video_source.h"
 
 namespace content {
@@ skipping 24 matching lines @@
 
   void CompleteGetSupportedFormats();
 
   const media::VideoCaptureParams& start_params() const { return params_; }
   int max_requested_height() const { return max_requested_height_; }
   int max_requested_width() const { return max_requested_width_; }
 
  protected:
   void DeliverVideoFrameOnIO(const scoped_refptr<media::VideoFrame>& frame,
                              media::VideoCaptureFormat format,
+                             const base::TimeTicks& start_ticks,
                              const VideoCaptureDeliverFrameCB& frame_callback);
 
   // Implements MediaStreamVideoSource.
   virtual void GetCurrentSupportedFormats(
       int max_requested_height,
       int max_requested_width,
       const VideoCaptureDeviceFormatsCB& callback) OVERRIDE;
   virtual void StartSourceImpl(
       const media::VideoCaptureParams& params,
       const VideoCaptureDeliverFrameCB& frame_callback) OVERRIDE;
   virtual void StopSourceImpl() OVERRIDE;
 
  private:
   media::VideoCaptureParams params_;
   media::VideoCaptureFormats supported_formats_;
   bool manual_get_supported_formats_;
   int max_requested_height_;
   int max_requested_width_;
   bool attempted_to_start_;
   VideoCaptureDeviceFormatsCB formats_callback_;
   VideoCaptureDeliverFrameCB frame_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(MockMediaStreamVideoSource);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MOCK_MEDIA_STREAM_VIDEO_SOURCE_H_