Cast:Transport: Dividing A/V Initialization pipeline

media/cast/transport/pacing/paced_sender.h

 // Copyright 2013 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 MEDIA_CAST_TRANSPORT_PACING_PACED_SENDER_H_
 #define MEDIA_CAST_TRANSPORT_PACING_PACED_SENDER_H_
 
 #include <list>
 #include <vector>
 
@@ skipping 58 matching lines @@
                               PacketList* packets_not_sent);
 
   // Actually sends the packets to the transport.
   bool TransmitPackets(const PacketList& packets);
   void SendStoredPackets();
   void UpdateBurstSize(size_t num_of_packets);
 
   // Not owned by this class.
   base::TickClock* const clock_;
   PacketSender* transport_;  // Not owned by this class.
-  scoped_refptr<base::TaskRunner> transport_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> transport_task_runner_;
   size_t burst_size_;
   size_t packets_sent_in_burst_;
   base::TimeTicks time_last_process_;
   // Note: We can't combine the |packet_list_| and the |resend_packet_list_|
   // since then we might get reordering of the retransmitted packets.
   PacketList packet_list_;
   PacketList resend_packet_list_;
 
   base::WeakPtrFactory<PacedSender> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(PacedSender);
 };
 
 }  // namespace transport
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_TRANSPORT_PACING_PACED_SENDER_H_