Manual refactor to enum-based WaitableEvent for remaining mac/ios files

ui/accelerated_widget_mac/window_resize_helper_mac.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 "ui/accelerated_widget_mac/window_resize_helper_mac.h"
 
 #include <stdint.h>
 
 #include <list>
 
@@ skipping 157 matching lines @@
   }
   pumpable_task_runner_ = NULL;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // PumpableTaskRunner
 
 PumpableTaskRunner::PumpableTaskRunner(
     const EventTimedWaitCallback& event_timed_wait_callback,
     const scoped_refptr<base::SingleThreadTaskRunner>& target_task_runner)
-    : event_(false /* auto-reset */, false /* initially signalled */),
+    : event_(base::WaitableEvent::ResetPolicy::AUTOMATIC,
+             base::WaitableEvent::InitialState::NOT_SIGNALED),
       event_timed_wait_callback_(event_timed_wait_callback),
       target_task_runner_(target_task_runner) {}
 
 PumpableTaskRunner::~PumpableTaskRunner() {
   // Because tasks hold a reference to the task runner, the task queue must
   // be empty when it is destroyed.
   DCHECK(task_queue_.empty());
 }
 
 bool PumpableTaskRunner::WaitForSingleWrappedTaskToRun(
@@ skipping 123 matching lines @@
 WindowResizeHelperMac::WindowResizeHelperMac() {}
 WindowResizeHelperMac::~WindowResizeHelperMac() {}
 
 void WindowResizeHelperMac::EventTimedWait(base::WaitableEvent* event,
                                            base::TimeDelta delay) {
   base::ThreadRestrictions::ScopedAllowWait allow_wait;
   event->TimedWait(delay);
 }
 
 }  // namespace ui