[Draft] RtpPacket sketched.

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h

Index: webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h
index 997a19b9ade6ce5f651f2e40d8ec593c79a8b406..8834a25fcfe58e562a48ff024576819eb8a72174 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h
+++ b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h
@@ -13,6 +13,7 @@
 
 #include <list>
 #include <set>
+#include <string>
 #include <utility>
 #include <vector>
 
@@ -64,6 +65,10 @@ class ModuleRtpRtcpImpl : public RtpRtcp {
 
   int32_t DeregisterSendRtpHeaderExtension(RTPExtensionType type) override;
 
+  bool RegisterRtpHeaderExtension(const std::string& type,
+                                  MediaType media,
+                                  uint8_t id) override;
+
   // Get start timestamp.
   uint32_t StartTimestamp() const override;
 
@@ -230,8 +235,6 @@ class ModuleRtpRtcpImpl : public RtpRtcp {
   // requests.
   void SetStorePacketsStatus(bool enable, uint16_t number_to_store) override;
 
-  bool StorePackets() const override;
-
   // Called on receipt of RTCP report block from remote side.
   void RegisterRtcpStatisticsCallback(
       RtcpStatisticsCallback* callback) override;