Refactor: simplify interface of SenderRtcpSession and CastTransport.

chrome/renderer/media/cast_transport_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_IPC_H_
 #define CHROME_RENDERER_MEDIA_CAST_TRANSPORT_IPC_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 16 matching lines @@
                    std::unique_ptr<base::DictionaryValue> options,
                    const media::cast::PacketReceiverCallback& packet_callback,
                    const media::cast::CastTransportStatusCallback& status_cb,
                    const media::cast::BulkRawEventsCallback& raw_events_cb);
 
   ~CastTransportIPC() override;
 
   // media::cast::CastTransport implementation.
   void InitializeAudio(
       const media::cast::CastTransportRtpConfig& config,
-      const media::cast::RtcpCastMessageCallback& cast_message_cb,
-      const media::cast::RtcpRttCallback& rtt_cb,
-      const media::cast::RtcpPliCallback& pli_cb) override;
+      std::unique_ptr<media::cast::RtcpObserver> rtcp_observer) override;
   void InitializeVideo(
       const media::cast::CastTransportRtpConfig& config,
-      const media::cast::RtcpCastMessageCallback& cast_message_cb,
-      const media::cast::RtcpRttCallback& rtt_cb,
-      const media::cast::RtcpPliCallback& pli_cb) override;
+      std::unique_ptr<media::cast::RtcpObserver> rtcp_observer) override;
   void InsertFrame(uint32_t ssrc,
                    const media::cast::EncodedFrame& frame) override;
   void SendSenderReport(
       uint32_t ssrc,
       base::TimeTicks current_time,
       media::cast::RtpTimeTicks current_time_as_rtp_timestamp) override;
   void CancelSendingFrames(
       uint32_t ssrc,
       const std::vector<media::cast::FrameId>& frame_ids) override;
   void ResendFrameForKickstart(uint32_t ssrc,
@@ skipping 15 matching lines @@
   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_t rtp_sender_ssrc, base::TimeDelta rtt);
   void OnRtcpCastMessage(uint32_t rtp_sender_ssrc,
                          const media::cast::RtcpCastMessage& cast_message);
   void OnReceivedPli(uint32_t rtp_sender_ssrc);
   void OnReceivedPacket(const media::cast::Packet& packet);
 
  private:
-  struct ClientCallbacks {
-    ClientCallbacks();
-    ClientCallbacks(const ClientCallbacks& other);
-    ~ClientCallbacks();
-
-    media::cast::RtcpCastMessageCallback cast_message_cb;
-    media::cast::RtcpRttCallback rtt_cb;
-    media::cast::RtcpPliCallback pli_cb;
-  };
-
   void Send(IPC::Message* message);
 
   int32_t channel_id_;
   media::cast::PacketReceiverCallback packet_callback_;
   media::cast::CastTransportStatusCallback status_callback_;
   media::cast::BulkRawEventsCallback raw_events_callback_;
-  typedef std::map<uint32_t, ClientCallbacks> ClientMap;
+  using ClientMap =
+      std::map<uint32_t, std::unique_ptr<media::cast::RtcpObserver>>;
   ClientMap clients_;
 
   DISALLOW_COPY_AND_ASSIGN(CastTransportIPC);
 };
 
 #endif  // CHROME_RENDERER_MEDIA_CAST_TRANSPORT_IPC_H_