Make IPC::Channel polymorphic

ipc/ipc_test_sink.h

Index: ipc/ipc_test_sink.h
diff --git a/ipc/ipc_test_sink.h b/ipc/ipc_test_sink.h
index 78be9e752699f7111d273beb9089c969a37890d7..10ace558586a60cb4b69d2a72341689a832655b9 100644
--- a/ipc/ipc_test_sink.h
+++ b/ipc/ipc_test_sink.h
@@ -78,6 +78,18 @@ class TestSink : public Channel {
   // Interface in IPC::Channel. This copies the message to the sink and then
   // deletes it.
   virtual bool Send(IPC::Message* message) OVERRIDE;
+  virtual bool Connect() WARN_UNUSED_RESULT OVERRIDE;
+  virtual void Close() OVERRIDE;
+  virtual base::ProcessId GetPeerPID() const OVERRIDE;
+
+#if defined(OS_POSIX) && !defined(OS_NACL)
+  virtual int GetClientFileDescriptor() const OVERRIDE;
+  virtual int TakeClientFileDescriptor() OVERRIDE;
+  virtual bool AcceptsConnections() const OVERRIDE;
+  virtual bool HasAcceptedConnection() const OVERRIDE;
+  virtual bool GetPeerEuid(uid_t* peer_euid) const OVERRIDE;
+  virtual void ResetToAcceptingConnectionState() OVERRIDE;
+#endif  // defined(OS_POSIX) && !defined(OS_NACL)
 
   // 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.