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

mojo/edk/system/raw_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/raw_channel.h"
 
 #include <stdint.h>
 #include <stdio.h>
 
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "mojo/edk/embedder/platform_channel_pair.h"
 #include "mojo/edk/embedder/platform_handle.h"
 #include "mojo/edk/embedder/scoped_platform_handle.h"
 #include "mojo/edk/system/message_in_transit.h"
 #include "mojo/edk/system/test/random.h"
 #include "mojo/edk/system/test/scoped_test_dir.h"
 #include "mojo/edk/system/test/simple_test_thread.h"
 #include "mojo/edk/system/test/sleep.h"
 #include "mojo/edk/system/test/test_io_thread.h"
 #include "mojo/edk/system/transport_data.h"
-#include "mojo/edk/system/waitable_event.h"
 #include "mojo/edk/test/test_utils.h"
 #include "mojo/edk/util/make_unique.h"
 #include "mojo/edk/util/mutex.h"
 #include "mojo/edk/util/scoped_file.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::Mutex;
 using mojo::util::MutexLocker;
 
 namespace mojo {
 namespace system {
 namespace {
 
 std::unique_ptr<MessageInTransit> MakeTestMessage(uint32_t num_bytes) {
   std::vector<unsigned char> bytes(num_bytes, 0);
   for (size_t i = 0; i < num_bytes; i++)
@@ skipping 774 matching lines @@
 
   io_thread()->PostTaskAndWait(
       base::Bind(&RawChannel::Shutdown, base::Unretained(rc_read.get())));
   io_thread()->PostTaskAndWait(
       base::Bind(&RawChannel::Shutdown, base::Unretained(rc_write.get())));
 }
 
 }  // namespace
 }  // namespace system
 }  // namespace mojo