Eliminate ash::internal namespace

ash/wm/overlay_event_filter.h

 // 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.
 
 #ifndef ASH_WM_OVERLAY_EVENT_FILTER_H_
 #define ASH_WM_OVERLAY_EVENT_FILTER_H_
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "base/compiler_specific.h"
 #include "ui/aura/window.h"
 #include "ui/events/event_handler.h"
 
 namespace ash {
-namespace internal {
 
 // EventFilter for the "overlay window", which intercepts events before they are
 // processed by the usual path (e.g. the partial screenshot UI, the keyboard
 // overlay).  It does nothing the first time, but works when |Activate()| is
 // called.  The main task of this event filter is just to stop propagation
 // of any key events during activation, and also signal cancellation when keys
 // for canceling are pressed.
 class ASH_EXPORT OverlayEventFilter : public ui::EventHandler,
                                       public ShellObserver {
  public:
@@ skipping 33 matching lines @@
   virtual void OnLoginStateChanged(user::LoginStatus status) OVERRIDE;
   virtual void OnAppTerminating() OVERRIDE;
   virtual void OnLockStateChanged(bool locked) OVERRIDE;
 
  private:
   Delegate* delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(OverlayEventFilter);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_OVERLAY_EVENT_FILTER_H_