Enable passing receive stream ID to the decoder factory.

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 448 matching lines @@
       webrtc::VideoDecoder* external_decoder;
       webrtc::VideoCodecType type;
       bool external;
     };
 
     void RecreateWebRtcStream();
 
     void ConfigureCodecs(const std::vector<VideoCodecSettings>& recv_codecs,
                          std::vector<AllocatedDecoder>* old_codecs);
     AllocatedDecoder CreateOrReuseVideoDecoder(
+        uint32_t ssrc,
         std::vector<AllocatedDecoder>* old_decoder,
         const VideoCodec& codec);
     void ClearDecoders(std::vector<AllocatedDecoder>* allocated_decoders);
 
     std::string GetCodecNameFromPayloadType(int payload_type);
 
     webrtc::Call* const call_;
     const std::vector<uint32_t> ssrcs_;
     const std::vector<SsrcGroup> ssrc_groups_;
 
@@ skipping 70 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_