Convert mojo::system::ChannelEndpointClient to use our new refcounting stuff (instead of base's).

mojo/edk/system/message_pipe_test_utils.cc

 // 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.
 
 #include "mojo/edk/system/message_pipe_test_utils.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "mojo/edk/system/channel.h"
 #include "mojo/edk/system/channel_endpoint.h"
 #include "mojo/edk/system/message_pipe.h"
 #include "mojo/edk/system/test_utils.h"
 #include "mojo/edk/system/waiter.h"
 
 namespace mojo {
 namespace system {
 namespace test {
 
-MojoResult WaitIfNecessary(scoped_refptr<MessagePipe> mp,
+MojoResult WaitIfNecessary(MessagePipe* mp,
                            MojoHandleSignals signals,
                            HandleSignalsState* signals_state) {
   Waiter waiter;
   waiter.Init();
 
   MojoResult add_result =
       mp->AddAwakable(0, &waiter, signals, 0, signals_state);
   if (add_result != MOJO_RESULT_OK) {
     return (add_result == MOJO_RESULT_ALREADY_EXISTS) ? MOJO_RESULT_OK
                                                       : add_result;
@@ skipping 71 matching lines @@
 }
 
 void MultiprocessMessagePipeTestBase::Init(RefPtr<ChannelEndpoint>&& ep) {
   channel_thread_.Start(helper_.server_platform_handle.Pass(), std::move(ep));
 }
 #endif
 
 }  // namespace test
 }  // namespace system
 }  // namespace mojo