[Mojo Video Capture] Simplify media::VideoCaptureDevice::Client:Buffer to a struct

media/capture/video/video_frame_receiver.h

Index: media/capture/video/video_frame_receiver.h
diff --git a/media/capture/video/video_frame_receiver.h b/media/capture/video/video_frame_receiver.h
index e772f33df96b644a57857ef532cf123eea183080..55d98aa564ae49ca38a8761a9b788bd63810e621 100644
--- a/media/capture/video/video_frame_receiver.h
+++ b/media/capture/video/video_frame_receiver.h
@@ -17,7 +17,7 @@ class CAPTURE_EXPORT VideoFrameReceiver {
   virtual ~VideoFrameReceiver(){};
 
   virtual void OnIncomingCapturedVideoFrame(
-      std::unique_ptr<media::VideoCaptureDevice::Client::Buffer> buffer,
+      media::VideoCaptureDevice::Client::Buffer buffer,
       scoped_refptr<media::VideoFrame> frame) = 0;
   virtual void OnError() = 0;
   virtual void OnLog(const std::string& message) = 0;