Explicitly coerce PostDispatchAction to uint32_t in DispatchEvent()

ui/ozone/platform/dri/dri_window.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 "ui/ozone/platform/dri/dri_window.h"
 
 #include "base/bind.h"
 #include "ui/events/event.h"
 #include "ui/events/ozone/evdev/event_factory_evdev.h"
 #include "ui/events/ozone/events_ozone.h"
@@ skipping 90 matching lines @@
     return window_manager_->cursor()->GetCursorWindow() == widget_;
 
   return true;
 }
 
 uint32_t DriWindow::DispatchEvent(const PlatformEvent& native_event) {
   DispatchEventFromNativeUiEvent(
       native_event,
       base::Bind(&PlatformWindowDelegate::DispatchEvent,
                  base::Unretained(delegate_)));
-  return POST_DISPATCH_STOP_PROPAGATION;
+  return kPostDispatchStopPropagation;
 }
 
 void DriWindow::OnChannelEstablished() {
   sender_->Send(new OzoneGpuMsg_CreateWindowDelegate(widget_));
   sender_->Send(new OzoneGpuMsg_WindowBoundsChanged(widget_, bounds_));
 }
 
 void DriWindow::OnChannelDestroyed() {
 }
 
 }  // namespace ui