[Cast] RTT clean-up to the max!

chrome/renderer/media/cast_transport_sender_ipc.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_MEDIA_CAST_TRANSPORT_SENDER_IPC_H_
 #define CHROME_RENDERER_MEDIA_CAST_TRANSPORT_SENDER_IPC_H_
 
 #include <map>
 
 #include "base/message_loop/message_loop_proxy.h"
@@ skipping 35 matching lines @@
       uint32 current_time_as_rtp_timestamp) OVERRIDE;
   virtual void CancelSendingFrames(
       uint32 ssrc,
       const std::vector<uint32>& frame_ids) OVERRIDE;
   virtual void ResendFrameForKickstart(uint32 ssrc, uint32 frame_id) OVERRIDE;
 
   void OnNotifyStatusChange(
       media::cast::CastTransportStatus status);
   void OnRawEvents(const std::vector<media::cast::PacketEvent>& packet_events,
                    const std::vector<media::cast::FrameEvent>& frame_events);
-  void OnRtt(uint32 ssrc, const media::cast::RtcpRttReport& rtt_report);
+  void OnRtt(uint32 ssrc, base::TimeDelta rtt);
   void OnRtcpCastMessage(uint32 ssrc,
                          const media::cast::RtcpCastMessage& cast_message);
 
  private:
   struct ClientCallbacks {
     ClientCallbacks();
     ~ClientCallbacks();
 
     media::cast::RtcpCastMessageCallback cast_message_cb;
     media::cast::RtcpRttCallback rtt_cb;
   };
 
   void Send(IPC::Message* message);
 
   int32 channel_id_;
   media::cast::PacketReceiverCallback packet_callback_;
   media::cast::CastTransportStatusCallback status_callback_;
   media::cast::BulkRawEventsCallback raw_events_callback_;
   typedef std::map<uint32, ClientCallbacks> ClientMap;
   ClientMap clients_;
 
   DISALLOW_COPY_AND_ASSIGN(CastTransportSenderIPC);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_TRANSPORT_SENDER_IPC_H_