[Mojo Video Capture] Replace const scoped_refptr<T>& with scoped_refptr<T> and use std::move

media/capture/video/video_capture_device.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.
 //
 // VideoCaptureDevice is the abstract base class for realizing video capture
 // device support in Chromium. It provides the interface for OS dependent
 // implementations.
 // The class is created and functions are invoked on a thread owned by
 // VideoCaptureManager. Capturing is done on other threads, depending on the OS
 // specific implementation.
@@ skipping 101 matching lines @@
     // |timestamp|.
     // TODO(chfremer): Consider removing one of the two in order to simplify the
     // interface.
     virtual void OnIncomingCapturedBuffer(
         std::unique_ptr<Buffer> buffer,
         const VideoCaptureFormat& frame_format,
         base::TimeTicks reference_time,
         base::TimeDelta timestamp) = 0;
     virtual void OnIncomingCapturedVideoFrame(
         std::unique_ptr<Buffer> buffer,
-        const scoped_refptr<VideoFrame>& frame) = 0;
+        scoped_refptr<VideoFrame> frame) = 0;
 
     // Attempts to reserve the same Buffer provided in the last call to one of
     // the OnIncomingCapturedXXX() methods. This will fail if the content of the
     // Buffer has not been preserved, or if the |dimensions|, |format|, or
     // |storage| disagree with how it was reserved via ReserveOutputBuffer().
     // When this operation fails, nullptr will be returned.
     virtual std::unique_ptr<Buffer> ResurrectLastOutputBuffer(
         const gfx::Size& dimensions,
         VideoPixelFormat format,
         VideoPixelStorage storage) = 0;
@@ skipping 97 matching lines @@
 
  private:
   // Gets the power line frequency from the current system time zone if this is
   // defined, otherwise returns 0.
   PowerLineFrequency GetPowerLineFrequencyForLocation() const;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_CAPTURE_VIDEO_VIDEO_CAPTURE_DEVICE_H_