[Draft] RtpPacket sketched.

webrtc/modules/rtp_rtcp/source/rtp_packet.h

Index: webrtc/modules/rtp_rtcp/source/rtp_packet.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_packet.h b/webrtc/modules/rtp_rtcp/source/rtp_packet.h
index 9e9f4c1375b6f5a0106071d490a87f06d7de182e..745b75e39527c192b9ff5f8413b81779aaadf8fa 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_packet.h
+++ b/webrtc/modules/rtp_rtcp/source/rtp_packet.h
@@ -14,18 +14,17 @@
 
 #include "webrtc/base/basictypes.h"
 #include "webrtc/base/buffer.h"
-#include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 
 namespace webrtc {
 struct RTPHeader;
-class RtpHeaderExtensionMap;
+class RtpHeaderExtensionsManager;
 class Random;
 
 namespace rtp {
 class Packet {
  public:
-  using ExtensionType = RTPExtensionType;
-  using ExtensionManager = RtpHeaderExtensionMap;
+  using ExtensionType = const char*;
+  using ExtensionManager = RtpHeaderExtensionsManager;
   static constexpr size_t kMaxExtensionHeaders = 14;
 
   // Parse and copy given buffer into Packet.