Filter overlapping RTP header extensions.

talk/media/webrtc/webrtcmediaengine.h

 /*
  * libjingle
  * Copyright 2011 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 30 matching lines @@
 namespace cricket {
 
 class WebRtcMediaEngineFactory {
  public:
   static MediaEngineInterface* Create(
       webrtc::AudioDeviceModule* adm,
       WebRtcVideoEncoderFactory* encoder_factory,
       WebRtcVideoDecoderFactory* decoder_factory);
 };
 
+extern const char* kBweExtensionPriorities[];
+extern const size_t kBweExtensionPrioritiesLength;
+
+std::vector<RtpHeaderExtension> FilterRedundantRtpExtensions(
+    const std::vector<RtpHeaderExtension>& extensions,
+    const char* extension_prios[],
+    size_t extension_prios_length);
+
 }  // namespace cricket
 
 #endif  // TALK_MEDIA_WEBRTCMEDIAENGINE_H_