Rename the aura_shell namespace to ash

ash/wm/modality_event_filter.cc

 // Copyright (c) 2011 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 "ash/wm/modality_event_filter.h"
 
 #include "ash/wm/modality_event_filter_delegate.h"
 #include "ui/aura/event.h"
 
-namespace aura_shell {
+namespace ash {
 namespace internal {
 
 ModalityEventFilter::ModalityEventFilter(aura::Window* container,
                                          ModalityEventFilterDelegate* delegate)
     : EventFilter(container),
       delegate_(delegate) {
 }
 
 ModalityEventFilter::~ModalityEventFilter() {
 }
 
 bool ModalityEventFilter::PreHandleKeyEvent(aura::Window* target,
                                             aura::KeyEvent* event) {
   return !delegate_->CanWindowReceiveEvents(target);
 }
 
 bool ModalityEventFilter::PreHandleMouseEvent(aura::Window* target,
                                               aura::MouseEvent* event) {
   return !delegate_->CanWindowReceiveEvents(target);
 }
 
 ui::TouchStatus ModalityEventFilter::PreHandleTouchEvent(
     aura::Window* target,
     aura::TouchEvent* event) {
   // TODO(sadrul): !
   return ui::TOUCH_STATUS_UNKNOWN;
 }
 
 }  // namespace internal
-}  // namespace aura_shell
+}  // namespace ash