PlatformEventDispatcher::DispatchEvent() should return a PostDispatchAction

ui/display/chromeos/x11/native_display_event_dispatcher_x11.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 "base/time/default_tick_clock.h"
 #include "ui/display/chromeos/x11/native_display_event_dispatcher_x11.h"
 #include "ui/display/chromeos/x11/display_mode_x11.h"
 #include "ui/display/chromeos/x11/display_snapshot_x11.h"
 #include "ui/events/platform/platform_event_source.h"
 
@@ skipping 14 matching lines @@
 }
 
 NativeDisplayEventDispatcherX11::~NativeDisplayEventDispatcherX11() {}
 
 bool NativeDisplayEventDispatcherX11::CanDispatchEvent(
     const PlatformEvent& event) {
   return (event->type - xrandr_event_base_ == RRScreenChangeNotify) ||
          (event->type - xrandr_event_base_ == RRNotify);
 }
 
-uint32_t NativeDisplayEventDispatcherX11::DispatchEvent(
+ui::PostDispatchAction NativeDisplayEventDispatcherX11::DispatchEvent(
     const PlatformEvent& event) {
   if (event->type - xrandr_event_base_ == RRScreenChangeNotify) {
     VLOG(1) << "Received RRScreenChangeNotify event";
     delegate_->UpdateXRandRConfiguration(event);
     return ui::POST_DISPATCH_PERFORM_DEFAULT;
   }
 
   // Bail out early for everything except RRNotify_OutputChange events
   // about an output getting connected or disconnected.
   if (event->type - xrandr_event_base_ != RRNotify)
@@ skipping 52 matching lines @@
   return ui::POST_DISPATCH_PERFORM_DEFAULT;
 }
 
 void NativeDisplayEventDispatcherX11::SetTickClockForTest(
     scoped_ptr<base::TickClock> tick_clock) {
   tick_clock_ = tick_clock.Pass();
   startup_time_ = tick_clock_->NowTicks();
 }
 
 }  // namespace ui