Decouple capture timestamp and reference time

media/capture/video/mac/video_capture_device_mac.h

 // Copyright (c) 2012 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.
 
 // MacOSX implementation of generic VideoCaptureDevice, using AVFoundation as
 // native capture API. AVFoundation is available in versions 10.7 (Lion) and
 // later.
 
 #ifndef MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_
 #define MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_
@@ skipping 81 matching lines @@
   std::unique_ptr<VideoCaptureDevice::Client> client_;
 
   VideoCaptureFormat capture_format_;
 
   // Only read and write state_ from inside this loop.
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   InternalState state_;
 
   base::scoped_nsobject<VideoCaptureDeviceAVFoundation> capture_device_;
 
-  base::TimeDelta first_timestamp_;
-  base::TimeTicks first_aligned_timestamp_;
-
   // Used with Bind and PostTask to ensure that methods aren't called after the
   // VideoCaptureDeviceMac is destroyed.
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<VideoCaptureDeviceMac> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceMac);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_VIDEO_CAPTURE_MAC_VIDEO_CAPTURE_DEVICE_MAC_H_