Cast: Add tests for clocks being slow/fast

media/cast/test/utility/udp_proxy.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 MEDIA_CAST_TEST_UTILITY_UDP_PROXY_H_
 #define MEDIA_CAST_TEST_UTILITY_UDP_PROXY_H_
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/single_thread_task_runner.h"
 #include "media/cast/transport/cast_transport_config.h"
 #include "net/base/ip_endpoint.h"
 
 namespace net {
 class NetLog;
 };
 
+namespace base {
+class TickClock;
+};
+
 namespace media {
 namespace cast {
 namespace test {
 
 class PacketPipe {
  public:
   PacketPipe();
   virtual ~PacketPipe();
   virtual void Send(scoped_ptr<transport::Packet> packet) = 0;
   // Allows injection of fake test runner for testing.
   virtual void InitOnIOThread(
-      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner);
+      const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
+      base::TickClock* clock);
   virtual void AppendToPipe(scoped_ptr<PacketPipe> pipe);
  protected:
   scoped_ptr<PacketPipe> pipe_;
   // Allows injection of fake task runner for testing.
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
+  base::TickClock* clock_;
 };
 
 // A UDPProxy will set up a UDP socket and bind to |local_port|.
 // Packets send to that port will be forwarded to |destination|.
 // Packets send from |destination| to |local_port| will be returned
 // to whoever sent a packet to |local_port| last. (Not counting packets
 // from |destination|.) The UDPProxy will run a separate thread to
 // do the forwarding of packets, and will keep doing so until destroyed.
 // You can insert delays and packet drops by supplying a PacketPipe.
 // The PacketPipes may also be NULL if you just want to forward packets.
@@ skipping 53 matching lines @@
 // This method builds a stack of PacketPipes to emulate a crappy wifi network.
 // ~2mbit, 20% packet loss, ~40ms latency and packets can get reordered.
 // 300ms drouputs every ~2 seconds.
 scoped_ptr<PacketPipe> EvilNetwork();
 
 }  // namespace test
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_TEST_UTILITY_UDP_PROXY_H_