Movable support for VideoReceiveStream::Config and avoid copies

webrtc/media/engine/fakewebrtccall.cc

 /*
  *  Copyright (c) 2015 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 190 matching lines @@
 
 void FakeVideoSendStream::Start() {
   sending_ = true;
 }
 
 void FakeVideoSendStream::Stop() {
   sending_ = false;
 }
 
 FakeVideoReceiveStream::FakeVideoReceiveStream(
-    const webrtc::VideoReceiveStream::Config& config)
-    : config_(config), receiving_(false) {
-}
+    webrtc::VideoReceiveStream::Config config)
+    : config_(std::move(config)), receiving_(false) {}
 
-webrtc::VideoReceiveStream::Config FakeVideoReceiveStream::GetConfig() {
+const webrtc::VideoReceiveStream::Config& FakeVideoReceiveStream::GetConfig() {
   return config_;
 }
 
 bool FakeVideoReceiveStream::IsReceiving() const {
   return receiving_;
 }
 
 void FakeVideoReceiveStream::InjectFrame(const webrtc::VideoFrame& frame) {
   config_.renderer->OnFrame(frame);
 }
@@ skipping 141 matching lines @@
                       static_cast<FakeVideoSendStream*>(send_stream));
   if (it == video_send_streams_.end()) {
     ADD_FAILURE() << "DestroyVideoSendStream called with unknown parameter.";
   } else {
     delete *it;
     video_send_streams_.erase(it);
   }
 }
 
 webrtc::VideoReceiveStream* FakeCall::CreateVideoReceiveStream(
-    const webrtc::VideoReceiveStream::Config& config) {
-  video_receive_streams_.push_back(new FakeVideoReceiveStream(config));
+    webrtc::VideoReceiveStream::Config config) {
+  video_receive_streams_.push_back(
+      new FakeVideoReceiveStream(std::move(config)));
   ++num_created_receive_streams_;
   return video_receive_streams_.back();
 }
 
 void FakeCall::DestroyVideoReceiveStream(
     webrtc::VideoReceiveStream* receive_stream) {
   auto it = std::find(video_receive_streams_.begin(),
                       video_receive_streams_.end(),
                       static_cast<FakeVideoReceiveStream*>(receive_stream));
   if (it == video_receive_streams_.end()) {
@@ skipping 71 matching lines @@
     case webrtc::MediaType::ANY:
       ADD_FAILURE()
           << "SignalChannelNetworkState called with unknown parameter.";
   }
 }
 
 void FakeCall::OnSentPacket(const rtc::SentPacket& sent_packet) {
   last_sent_packet_ = sent_packet;
 }
 }  // namespace cricket