base: Do not allow MessagePumpObservers to consume events.

ui/aura/device_list_updater_aurax11.cc

 // Copyright (c) 2012 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/aura/device_list_updater_aurax11.h"
 
 #include <X11/extensions/XInput2.h>
 
 #include "ui/events/event_utils.h"
 
 namespace aura {
 
 DeviceListUpdaterAuraX11::DeviceListUpdaterAuraX11() {}
 
 DeviceListUpdaterAuraX11::~DeviceListUpdaterAuraX11() {}
 
-base::EventStatus DeviceListUpdaterAuraX11::WillProcessEvent(
+void DeviceListUpdaterAuraX11::WillProcessEvent(
     const base::NativeEvent& event) {
   // XI_HierarchyChanged events are special. There is no window associated with
   // these events. So process them directly from here.
   if (event->type == GenericEvent &&
       event->xgeneric.evtype == XI_HierarchyChanged) {
     ui::UpdateDeviceList();
   }
-
-  return base::EVENT_CONTINUE;
 }
 
 void DeviceListUpdaterAuraX11::DidProcessEvent(const base::NativeEvent& event) {
 }
 
 }  // namespace aura