Remove deprecated functions from comment for IPC::TestSink.

ipc/ipc_test_sink.h

 // Copyright (c) 2011 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 IPC_IPC_TEST_SINK_H_
 #define IPC_IPC_TEST_SINK_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 41 matching lines @@
 //   ASSERT_TRUE(msg);
 //   base::TupleTypes<ViewHostMsg_Foo::ReplyParam>::ValueTuple reply_data;
 //   EXPECT_TRUE(ViewHostMsg_Foo::ReadReplyParam(msg, &reply_data));
 //
 // You can also register to be notified when messages are posted to the sink.
 // This can be useful if you need to wait for a particular message that will
 // be posted asynchronously.  Example usage:
 //
 //   class MyListener : public IPC::Listener {
 //    public:
+//     MyListener(const base::Closure& closure)
+//       : message_received_closure_(closure) {}
 //     virtual bool OnMessageReceived(const IPC::Message& msg) {
 //       <do something with the message>
-//       MessageLoop::current()->QuitWhenIdle();
+//       message_received_closure_.Run();
 //       return false;  // to store the message in the sink, or true to drop it
 //     }
+//    private:
+//     base::Closure message_received_closure_;
 //   };
 //
-//   MyListener listener;
+//   base::RunLoop run_loop;
+//   MyListener listener(run_loop.QuitClosure());
 //   test_sink.AddFilter(&listener);
 //   StartSomeAsynchronousProcess(&test_sink);
-//   MessageLoop::current()->Run();
+//   run_loop.Run();
 //   <inspect the results>
 //   ...
 //
 // To hook up the sink, all you need to do is call OnMessageReceived when a
 // message is received.
 class TestSink : public Channel {
  public:
   TestSink();
   ~TestSink() override;
 
@@ skipping 51 matching lines @@
   // The actual list of received messages.
   std::vector<Message> messages_;
   base::ObserverList<Listener> filter_list_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSink);
 };
 
 }  // namespace IPC
 
 #endif  // IPC_IPC_TEST_SINK_H_