Decouple capture timestamp and reference time

media/capture/video/mac/video_capture_device_decklink_mac.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.
 
 // Implementation of VideoCaptureDevice class for Blackmagic video capture
 // devices by using the DeckLink SDK.
 
 #ifndef MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
 #define MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_
 
@@ skipping 38 matching lines @@
 
   explicit VideoCaptureDeviceDeckLinkMac(const Name& device_name);
   ~VideoCaptureDeviceDeckLinkMac() override;
 
   // Copy of VideoCaptureDevice::Client::OnIncomingCapturedData(). Used by
   // |decklink_capture_delegate_| to forward captured frames.
   void OnIncomingCapturedData(const uint8_t* data,
                               size_t length,
                               const VideoCaptureFormat& frame_format,
                               int rotation,  // Clockwise.
-                              base::TimeTicks timestamp);
+                              base::TimeTicks reference_time,
+                              base::TimeDelta timestamp);
 
   // Forwarder to VideoCaptureDevice::Client::OnError().
   void SendErrorString(const tracked_objects::Location& from_here,
                        const std::string& reason);
 
   // Forwarder to VideoCaptureDevice::Client::OnLog().
   void SendLogString(const std::string& message);
 
  private:
   // VideoCaptureDevice implementation.
@@ skipping 12 matching lines @@
 
   // Checks for Device (a.k.a. Audio) thread.
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceDeckLinkMac);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_VIDEO_CAPTURE_DEVICE_DECKLINK_MAC_H_