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

mojo/edk/system/waiter_test_utils.cc

 // Copyright 2013 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/waiter_test_utils.h"
 
 #include <utility>
 
+using mojo::util::RefPtr;
+
 namespace mojo {
 namespace system {
 namespace test {
 
 SimpleWaiterThread::SimpleWaiterThread(MojoResult* result, uint32_t* context)
     : result_(result), context_(context) {
   waiter_.Init();
   *result_ = 5420734;    // Totally invalid result.
   *context_ = 23489023;  // "Random".
 }
@@ skipping 43 matching lines @@
     return;
 
   *did_wait_out_ = true;
   *result_out_ = waiter_.Wait(deadline_, context_out_);
   dispatcher_->RemoveAwakable(&waiter_, signals_state_out_);
 }
 
 }  // namespace test
 }  // namespace system
 }  // namespace mojo