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

media/capture/video/video_capture_device_unittest.cc

Index: media/capture/video/video_capture_device_unittest.cc
diff --git a/media/capture/video/video_capture_device_unittest.cc b/media/capture/video/video_capture_device_unittest.cc
index 226bc59cb614a9520853888d7478713af1470afc..6b593dc3755e64e663fb45537befc084c08c1e69 100644
--- a/media/capture/video/video_capture_device_unittest.cc
+++ b/media/capture/video/video_capture_device_unittest.cc
@@ -135,9 +135,8 @@ class MockVideoCaptureClient : public VideoCaptureDevice::Client {
                                 base::TimeDelta timestamp) override {
     DoOnIncomingCapturedBuffer();
   }
-  void OnIncomingCapturedVideoFrame(
-      std::unique_ptr<Buffer> buffer,
-      const scoped_refptr<VideoFrame>& frame) override {
+  void OnIncomingCapturedVideoFrame(std::unique_ptr<Buffer> buffer,
+                                    scoped_refptr<VideoFrame> frame) override {
     DoOnIncomingCapturedVideoFrame();
   }
   std::unique_ptr<Buffer> ResurrectLastOutputBuffer(