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

media/capture/video/video_capture_jpeg_decoder.h

 // Copyright 2016 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.
 
 #include "base/callback.h"
 #include "media/capture/capture_export.h"
 #include "media/capture/video/video_capture_device.h"
 
 namespace media {
 
 class CAPTURE_EXPORT VideoCaptureJpegDecoder {
  public:
   // Enumeration of decoder status. The enumeration is published for clients to
   // decide the behavior according to STATUS.
   enum STATUS {
     INIT_PENDING,  // Default value while waiting initialization finished.
     INIT_PASSED,   // Initialization succeed.
     FAILED,        // JPEG decode is not supported, initialization failed, or
                    // decode error.
   };
 
   using DecodeDoneCB = base::Callback<void(
       std::unique_ptr<media::VideoCaptureDevice::Client::Buffer>,
-      const scoped_refptr<media::VideoFrame>&)>;
+      scoped_refptr<media::VideoFrame>)>;
 
   virtual ~VideoCaptureJpegDecoder() {}
 
   // Creates and intializes decoder asynchronously.
   virtual void Initialize() = 0;
 
   // Returns initialization status.
   virtual STATUS GetStatus() const = 0;
 
   // Decodes a JPEG picture.
   virtual void DecodeCapturedData(
       const uint8_t* data,
       size_t in_buffer_size,
       const media::VideoCaptureFormat& frame_format,
       base::TimeTicks reference_time,
       base::TimeDelta timestamp,
       std::unique_ptr<media::VideoCaptureDevice::Client::Buffer>
           out_buffer) = 0;
 };
 
 }  // namespace media