Decouple capture timestamp and reference time

content/browser/renderer_host/media/video_capture_device_client.h

Index: content/browser/renderer_host/media/video_capture_device_client.h
diff --git a/content/browser/renderer_host/media/video_capture_device_client.h b/content/browser/renderer_host/media/video_capture_device_client.h
index 46a8d106da1e418cc4690d6749851d84446845bd..2831cc456e34e4ff96acfa08d0dabb23fdcf7c03 100644
--- a/content/browser/renderer_host/media/video_capture_device_client.h
+++ b/content/browser/renderer_host/media/video_capture_device_client.h
@@ -49,18 +49,20 @@ class CONTENT_EXPORT VideoCaptureDeviceClient
                               int length,
                               const media::VideoCaptureFormat& frame_format,
                               int rotation,
-                              const base::TimeTicks& timestamp) override;
+                              base::TimeTicks reference_time,
+                              base::TimeDelta timestamp) override;
   std::unique_ptr<Buffer> ReserveOutputBuffer(
       const gfx::Size& dimensions,
       media::VideoPixelFormat format,
       media::VideoPixelStorage storage) override;
   void OnIncomingCapturedBuffer(std::unique_ptr<Buffer> buffer,
                                 const media::VideoCaptureFormat& frame_format,
-                                const base::TimeTicks& timestamp) override;
+                                base::TimeTicks reference_time,
+                                base::TimeDelta timestamp) override;
   void OnIncomingCapturedVideoFrame(
       std::unique_ptr<Buffer> buffer,
       const scoped_refptr<media::VideoFrame>& frame,
-      const base::TimeTicks& timestamp) override;
+      base::TimeTicks reference_time) override;
   std::unique_ptr<Buffer> ResurrectLastOutputBuffer(
       const gfx::Size& dimensions,
       media::VideoPixelFormat format,