Movable support for VideoReceiveStream::Config and avoid copies

webrtc/media/engine/webrtcvideoengine2.h

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 401 matching lines @@
   // Wrapper for the receiver part, contains configs etc. that are needed to
   // reconstruct the underlying VideoReceiveStream. Also serves as a wrapper
   // between rtc::VideoSinkInterface<webrtc::VideoFrame> and
   // rtc::VideoSinkInterface<cricket::VideoFrame>.
   class WebRtcVideoReceiveStream
       : public rtc::VideoSinkInterface<webrtc::VideoFrame> {
    public:
     WebRtcVideoReceiveStream(
         webrtc::Call* call,
         const StreamParams& sp,
-        const webrtc::VideoReceiveStream::Config& config,
+        webrtc::VideoReceiveStream::Config config,
         WebRtcVideoDecoderFactory* external_decoder_factory,
         bool default_stream,
         const std::vector<VideoCodecSettings>& recv_codecs,
         bool red_disabled_by_remote_side);
     ~WebRtcVideoReceiveStream();
 
     const std::vector<uint32_t>& GetSsrcs() const;
 
     void SetLocalSsrc(uint32_t local_ssrc);
     // TODO(deadbeef): Move these feedback parameters into the recv parameters.
@@ skipping 118 matching lines @@
   // send_params/recv_params, rtp_extensions, options, etc.
   VideoSendParameters send_params_;
   VideoOptions default_send_options_;
   VideoRecvParameters recv_params_;
   bool red_disabled_by_remote_side_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOENGINE2_H_