Reland of Add task queue to Call.

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 230 matching lines @@
 
   // Wrapper for the sender part, this is where the source is connected and
   // frames are then converted from cricket frames to webrtc frames.
   class WebRtcVideoSendStream
       : public rtc::VideoSinkInterface<cricket::VideoFrame>,
         public webrtc::LoadObserver {
    public:
     WebRtcVideoSendStream(
         webrtc::Call* call,
         const StreamParams& sp,
-        const webrtc::VideoSendStream::Config& config,
+        webrtc::VideoSendStream::Config config,
         const VideoOptions& options,
         WebRtcVideoEncoderFactory* external_encoder_factory,
         bool enable_cpu_overuse_detection,
         int max_bitrate_bps,
         const rtc::Optional<VideoCodecSettings>& codec_settings,
         const rtc::Optional<std::vector<webrtc::RtpExtension>>& rtp_extensions,
         const VideoSendParameters& send_params);
     virtual ~WebRtcVideoSendStream();
 
     void SetSendParameters(const ChangedSendParameters& send_params);
@@ skipping 15 matching lines @@
     VideoSenderInfo GetVideoSenderInfo(bool log_stats);
     void FillBandwidthEstimationInfo(BandwidthEstimationInfo* bwe_info);
 
    private:
     // Parameters needed to reconstruct the underlying stream.
     // webrtc::VideoSendStream doesn't support setting a lot of options on the
     // fly, so when those need to be changed we tear down and reconstruct with
     // similar parameters depending on which options changed etc.
     struct VideoSendStreamParameters {
       VideoSendStreamParameters(
-          const webrtc::VideoSendStream::Config& config,
+          webrtc::VideoSendStream::Config config,
           const VideoOptions& options,
           int max_bitrate_bps,
           const rtc::Optional<VideoCodecSettings>& codec_settings);
       webrtc::VideoSendStream::Config config;
       VideoOptions options;
       int max_bitrate_bps;
       bool conference_mode;
       rtc::Optional<VideoCodecSettings> codec_settings;
       // Sent resolutions + bitrates etc. by the underlying VideoSendStream,
       // typically changes when setting a new resolution or reconfiguring
@@ skipping 258 matching lines @@
   VideoSendParameters send_params_;
   VideoOptions default_send_options_;
   VideoRecvParameters recv_params_;
   bool red_disabled_by_remote_side_;
   int64_t last_stats_log_ms_;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOENGINE2_H_