Mac Video Capture: Sending the timestamps provided by the driver to the capture pipeline

media/capture/video/mac/video_capture_device_mac.h

Index: media/capture/video/mac/video_capture_device_mac.h
diff --git a/media/capture/video/mac/video_capture_device_mac.h b/media/capture/video/mac/video_capture_device_mac.h
index c36248eb29323ef0837fc59b30788ad7e1080ca0..f22848dc7c9af9090b448f0c7484dab7cb5fe89e 100644
--- a/media/capture/video/mac/video_capture_device_mac.h
+++ b/media/capture/video/mac/video_capture_device_mac.h
@@ -70,7 +70,8 @@ class VideoCaptureDeviceMac : public VideoCaptureDevice {
                     int video_frame_length,
                     const VideoCaptureFormat& frame_format,
                     int aspect_numerator,
-                    int aspect_denominator);
+                    int aspect_denominator,
+                    base::TimeDelta timestamp);
 
   // Forwarder to VideoCaptureDevice::Client::OnError().
   void ReceiveError(const std::string& reason);
@@ -102,6 +103,9 @@ class VideoCaptureDeviceMac : public VideoCaptureDevice {
 
   id<PlatformVideoCapturingMac> 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.