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..c82e047a3e55bd0ddeb6cf526906366087ad2505 100644
--- a/webrtc/media/engine/webrtcvideodecoderfactory.h
+++ b/webrtc/media/engine/webrtcvideodecoderfactory.h
@@ -22,6 +22,14 @@ namespace cricket {
 
 class WebRtcVideoDecoderFactory {
  public:
+  // Some VideoDecoderFactories may choose to override this method for example
+  // to store the SSRC. Default behavior is just to call CreateVideoDecoder.
+  virtual webrtc::VideoDecoder* CreateVideoDecoderForSsrc(

[perkj_webrtc, 2016/06/10 13:46:39]

nit: Can you move this to below the existing CreateVideoDecoder and remove the
comments. They don't add any value. 

[sakal, 2016/06/14 13:28:44]

Done.

+      uint32_t ssrc,
+      webrtc::VideoCodecType type) {
+    return CreateVideoDecoder(type);
+  }
+
   // Caller takes the ownership of the returned object and it should be released
   // by calling DestroyVideoDecoder().
   virtual webrtc::VideoDecoder* CreateVideoDecoder(