Add task queue to Call.

webrtc/call.h

 /*
  *  Copyright (c) 2013 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.
  */
 #ifndef WEBRTC_CALL_H_
@@ skipping 95 matching lines @@
   virtual AudioSendStream* CreateAudioSendStream(
       const AudioSendStream::Config& config) = 0;
   virtual void DestroyAudioSendStream(AudioSendStream* send_stream) = 0;
 
   virtual AudioReceiveStream* CreateAudioReceiveStream(
       const AudioReceiveStream::Config& config) = 0;
   virtual void DestroyAudioReceiveStream(
       AudioReceiveStream* receive_stream) = 0;
 
   virtual VideoSendStream* CreateVideoSendStream(
-      const VideoSendStream::Config& config,
-      const VideoEncoderConfig& encoder_config) = 0;
+      VideoSendStream::Config config,
+      VideoEncoderConfig encoder_config) = 0;
   virtual void DestroyVideoSendStream(VideoSendStream* send_stream) = 0;
 
   virtual VideoReceiveStream* CreateVideoReceiveStream(
       VideoReceiveStream::Config configuration) = 0;
   virtual void DestroyVideoReceiveStream(
       VideoReceiveStream* receive_stream) = 0;
 
   // All received RTP and RTCP packets for the call should be inserted to this
   // PacketReceiver. The PacketReceiver pointer is valid as long as the
   // Call instance exists.
@@ skipping 26 matching lines @@
   virtual bool StartEventLog(rtc::PlatformFile log_file,
                              int64_t max_size_bytes) = 0;
   virtual void StopEventLog() = 0;
 
   virtual ~Call() {}
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_CALL_H_