Enable passing receive stream ID to the decoder factory.

webrtc/media/engine/webrtcvideodecoderfactory.h

Index: webrtc/media/engine/webrtcvideodecoderfactory.h
diff --git a/webrtc/media/engine/webrtcvideodecoderfactory.h b/webrtc/media/engine/webrtcvideodecoderfactory.h
index c739096ac5c190671432b3259033ceff11489455..7f0921fd12b04165db33ce669e1808240ad6d654 100644
--- a/webrtc/media/engine/webrtcvideodecoderfactory.h
+++ b/webrtc/media/engine/webrtcvideodecoderfactory.h
@@ -20,12 +20,21 @@ class VideoDecoder;
 
 namespace cricket {
 
+struct VideoDecoderParams {
+  std::string receive_stream_id;
+};
+
 class WebRtcVideoDecoderFactory {
  public:
   // Caller takes the ownership of the returned object and it should be released
   // by calling DestroyVideoDecoder().
   virtual webrtc::VideoDecoder* CreateVideoDecoder(
       webrtc::VideoCodecType type) = 0;
+  virtual webrtc::VideoDecoder* CreateVideoDecoderWithParams(
+      webrtc::VideoCodecType type,
+      VideoDecoderParams params) {
+    return CreateVideoDecoder(type);
+  }
   virtual ~WebRtcVideoDecoderFactory() {}
 
   virtual void DestroyVideoDecoder(webrtc::VideoDecoder* decoder) = 0;