[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

Index: content/browser/media/capture/desktop_capture_device_unittest.cc
diff --git a/content/browser/media/capture/desktop_capture_device_unittest.cc b/content/browser/media/capture/desktop_capture_device_unittest.cc
index 1954e43d3d26aad222ea546cbad4bf51fc258b48..5264b623506a337ab2c1e4d150a2770adc4afd7c 100644
--- a/content/browser/media/capture/desktop_capture_device_unittest.cc
+++ b/content/browser/media/capture/desktop_capture_device_unittest.cc
@@ -93,7 +93,7 @@ class MockDeviceClient : public media::VideoCaptureDevice::Client {
   }
   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(