Cast:Adding cast_transport_config and cleaning up

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>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/task_runner.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/time/default_tick_clock.h"
 #include "base/time/tick_clock.h"
 #include "base/time/time.h"
-#include "media/cast/cast_config.h"
-#include "media/cast/cast_environment.h"
+#include "media/cast/cast_config.h"  // PacketSender
+#include "media/cast/transport/cast_transport_config.h"
 
 namespace media {
 namespace cast {
 namespace transport {
 
 // We have this pure virtual class to enable mocking.
 class PacedPacketSender {
  public:
   // Inform the pacer / sender of the total number of packets.
   virtual bool SendPackets(const PacketList& packets) = 0;
 
   virtual bool ResendPackets(const PacketList& packets) = 0;
 
   virtual bool SendRtcpPacket(const Packet& packet) = 0;
 
   virtual ~PacedPacketSender() {}
 };
 
 class PacedSender : public PacedPacketSender,
                     public base::NonThreadSafe,
                     public base::SupportsWeakPtr<PacedSender> {
  public:
-  PacedSender(scoped_refptr<CastEnvironment> cast_environment,
-              PacketSender* transport);
+  PacedSender(base::TickClock* clock,
+              PacketSender* transport,
+              scoped_refptr<base::TaskRunner> transport_task_runner);
   virtual ~PacedSender();
 
   virtual bool SendPackets(const PacketList& packets) OVERRIDE;
 
   virtual bool ResendPackets(const PacketList& packets) OVERRIDE;
 
   virtual bool SendRtcpPacket(const Packet& packet) OVERRIDE;
 
  protected:
   // Schedule a delayed task on the main cast thread when it's time to send the
   // next packet burst.
   void ScheduleNextSend();
 
   // Process any pending packets in the queue(s).
   void SendNextPacketBurst();
 
  private:
   bool SendPacketsToTransport(const PacketList& packets,
                               PacketList* packets_not_sent);
   void SendStoredPackets();
   void UpdateBurstSize(size_t num_of_packets);
 
-  scoped_refptr<CastEnvironment> cast_environment_;
+  // Not owned by this class.
+  base::TickClock* const clock_;
   PacketSender* transport_;
+  scoped_refptr<base::TaskRunner> 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_