EDK: Move ref counting classes to mojo/edk/util.

mojo/edk/system/channel_unittest.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/channel.h"
 
 #include <utility>
 
 #include "mojo/edk/system/channel_endpoint.h"
 #include "mojo/edk/system/channel_endpoint_id.h"
 #include "mojo/edk/system/channel_test_base.h"
 #include "mojo/edk/system/message_pipe.h"
-#include "mojo/edk/system/ref_ptr.h"
 #include "mojo/edk/system/waiter.h"
+#include "mojo/edk/util/ref_ptr.h"
+
+using mojo::util::RefPtr;
 
 namespace mojo {
 namespace system {
 namespace {
 
 using ChannelTest = test::ChannelTestBase;
 
 void DoNothing() {}
 
 // ChannelTest.InitShutdown ----------------------------------------------------
@@ skipping 107 matching lines @@
     io_thread()->PostTaskAndWait(base::Bind(&DoNothing));
     EXPECT_FALSE(channel(0));
   }
 }
 
 // TODO(vtl): More. ------------------------------------------------------------
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo