Decouple capture timestamp and reference time

content/browser/renderer_host/media/video_capture_device_client.h

 // Copyright 2015 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_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_DEVICE_CLIENT_H_
 #define CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_DEVICE_CLIENT_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 31 matching lines @@
   VideoCaptureDeviceClient(
       const base::WeakPtr<VideoCaptureController>& controller,
       const scoped_refptr<VideoCaptureBufferPool>& buffer_pool);
   ~VideoCaptureDeviceClient() override;
 
   // VideoCaptureDevice::Client implementation.
   void OnIncomingCapturedData(const uint8_t* data,
                               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,
       media::VideoPixelStorage storage) override;
   void OnError(const tracked_objects::Location& from_here,
                const std::string& reason) override;
   void OnLog(const std::string& message) override;
   double GetBufferPoolUtilization() const override;
 
  private:
@@ skipping 34 matching lines @@
 
   media::VideoPixelFormat last_captured_pixel_format_;
 
   DISALLOW_COPY_AND_ASSIGN(VideoCaptureDeviceClient);
 };
 
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_MEDIA_VIDEO_CAPTURE_DEVICE_CLIENT_H_