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

content/browser/media/capture/desktop_capture_device_unittest.cc

 // Copyright (c) 2013 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 "content/browser/media/capture/desktop_capture_device.h"
 
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
 #include <algorithm>
@@ skipping 75 matching lines @@
     return std::unique_ptr<Buffer>();
   }
   void OnIncomingCapturedBuffer(std::unique_ptr<Buffer> buffer,
                                 const media::VideoCaptureFormat& frame_format,
                                 base::TimeTicks reference_time,
                                 base::TimeDelta timestamp) override {
     DoOnIncomingCapturedBuffer();
   }
   void OnIncomingCapturedVideoFrame(
       std::unique_ptr<Buffer> buffer,
-      const scoped_refptr<media::VideoFrame>& frame) override {
+      scoped_refptr<media::VideoFrame> frame) override {
     DoOnIncomingCapturedVideoFrame();
   }
   std::unique_ptr<Buffer> ResurrectLastOutputBuffer(
       const gfx::Size& dimensions,
       media::VideoPixelFormat format,
       media::VideoPixelStorage storage) override {
     EXPECT_TRUE(format == media::PIXEL_FORMAT_I420 &&
                 storage == media::PIXEL_STORAGE_CPU);
     DoResurrectLastOutputBuffer();
     return std::unique_ptr<Buffer>();
@@ skipping 443 matching lines @@
             frame_size);
   for (int i = 0; i < output_frame_->size().height(); ++i) {
     EXPECT_EQ(0,
         memcmp(inverted_frame->data() + i * inverted_frame->stride(),
                output_frame_->data() + i * output_frame_->stride(),
                output_frame_->stride()));
   }
 }
 
 }  // namespace content