Add a Pepper audio basic functionality unit test.

chrome/common/ipc_test_sink.h

Index: chrome/common/ipc_test_sink.h
diff --git a/chrome/common/ipc_test_sink.h b/chrome/common/ipc_test_sink.h
index 973fc71925092aa0f8ac261a25b5794d45b31262..056cb4cf273e07308145b4648002526e74e71112 100644
--- a/chrome/common/ipc_test_sink.h
+++ b/chrome/common/ipc_test_sink.h
@@ -10,6 +10,7 @@
 
 #include "base/basictypes.h"
 #include "ipc/ipc_message.h"
+#include "ipc/ipc_channel.h"
 
 namespace IPC {
 
@@ -40,14 +41,14 @@ namespace IPC {
 //
 // To hook up the sink, all you need to do is call OnMessageReceived when a
 // message is received.
-class TestSink {
+class TestSink : public IPC::Channel {
  public:
   TestSink();
   ~TestSink();
 
   // Used by the source of the messages to send the message to the sink. This
   // will make a copy of the message and store it in the list.
-  void OnMessageReceived(const Message& msg);
+  virtual bool Send(Message* message);
 
   // Returns the number of messages in the queue.
   size_t message_count() const { return messages_.size(); }