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

content/browser/media/capture/web_contents_video_capture_device_unittest.cc

 // 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.
 
 #include "content/browser/media/capture/web_contents_video_capture_device.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <utility>
@@ skipping 357 matching lines @@
   // Trampoline method to workaround GMOCK problems with std::unique_ptr<>.
   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 {
     EXPECT_FALSE(frame->visible_rect().IsEmpty());
     EXPECT_EQ(media::PIXEL_FORMAT_I420, frame->format());
     double frame_rate = 0;
     EXPECT_TRUE(
         frame->metadata()->GetDouble(media::VideoFrameMetadata::FRAME_RATE,
                                      &frame_rate));
     EXPECT_EQ(kTestFramesPerSecond, frame_rate);
 
     // TODO(miu): We just look at the center pixel presently, because if the
     // analysis is too slow, the backlog of frames will grow without bound and
@@ skipping 874 matching lines @@
   for (int i = 0; i < 3; ++i) {
     SimulateRefreshFrameRequest();
     ASSERT_NO_FATAL_FAILURE(client_observer()->WaitForNextColor(SK_ColorGREEN));
   }
 
   device()->StopAndDeAllocate();
 }
 
 }  // namespace
 }  // namespace content