Initial implementation of RtpTransportControllerReceive and related interfaces.

webrtc/audio/audio_receive_stream.h

Index: webrtc/audio/audio_receive_stream.h
diff --git a/webrtc/audio/audio_receive_stream.h b/webrtc/audio/audio_receive_stream.h
index dc7992f400cf8b053a70862c36717bee0eed4b4a..cde51e76951559b69aaa53711cea823ebb8ae9ca 100644
--- a/webrtc/audio/audio_receive_stream.h
+++ b/webrtc/audio/audio_receive_stream.h
@@ -19,6 +19,7 @@
 #include "webrtc/call/audio_receive_stream.h"
 #include "webrtc/call/rtp_packet_sink_interface.h"
 #include "webrtc/call/syncable.h"
+#include "webrtc/modules/rtp_rtcp/include/rtp_header_extension_map.h"
 #include "webrtc/rtc_base/constructormagic.h"
 #include "webrtc/rtc_base/thread_checker.h"
 
@@ -87,6 +88,8 @@ class AudioReceiveStream final : public webrtc::AudioReceiveStream,
   rtc::ThreadChecker worker_thread_checker_;
   rtc::ThreadChecker module_process_thread_checker_;
   const webrtc::AudioReceiveStream::Config config_;
+  RtpHeaderExtensionMap rtp_header_extensions_;
+
   rtc::scoped_refptr<webrtc::AudioState> audio_state_;
   std::unique_ptr<voe::ChannelProxy> channel_proxy_;