Reland "EDK: Move //mojo/edk/system/waitable_event* to edk/util."

mojo/edk/system/ipc_support_unittest.cc

 // Copyright 2015 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/ipc_support.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "mojo/edk/embedder/master_process_delegate.h"
 #include "mojo/edk/embedder/platform_channel_pair.h"
 #include "mojo/edk/embedder/simple_platform_support.h"
 #include "mojo/edk/embedder/slave_process_delegate.h"
 #include "mojo/edk/system/channel_manager.h"
 #include "mojo/edk/system/connection_identifier.h"
 #include "mojo/edk/system/dispatcher.h"
 #include "mojo/edk/system/message_pipe.h"
 #include "mojo/edk/system/message_pipe_dispatcher.h"
 #include "mojo/edk/system/process_identifier.h"
 #include "mojo/edk/system/test/test_command_line.h"
 #include "mojo/edk/system/test/test_io_thread.h"
 #include "mojo/edk/system/test/timeouts.h"
-#include "mojo/edk/system/waitable_event.h"
 #include "mojo/edk/system/waiter.h"
 #include "mojo/edk/test/multiprocess_test_helper.h"
 #include "mojo/edk/test/test_utils.h"
 #include "mojo/edk/util/command_line.h"
+#include "mojo/edk/util/waitable_event.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using mojo::util::AutoResetWaitableEvent;
+using mojo::util::ManualResetWaitableEvent;
 using mojo::util::RefPtr;
 
 namespace mojo {
 namespace system {
 namespace {
 
 const char kConnectionIdFlag[] = "test-connection-id";
 
 // Tests writing a message (containing just data) to |write_mp| and then reading
 // it from |read_mp| (it should be the next message, i.e., there should be no
@@ skipping 663 matching lines @@
 
   test_io_thread.PostTaskAndWait(base::Bind(&IPCSupport::ShutdownOnIOThread,
                                             base::Unretained(&ipc_support)));
 }
 
 // TODO(vtl): Also test the case of the master "dying" before the slave. (The
 // slave should get OnMasterDisconnect(), which we currently don't test.)
 
 }  // namespace system
 }  // namespace mojo