Eliminate ash::internal namespace

ash/system/ime/tray_ime.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_SYSTEM_IME_TRAY_IME_H_
 #define ASH_SYSTEM_IME_TRAY_IME_H_
 
 #include "ash/system/ime/ime_observer.h"
 #include "ash/system/tray/system_tray_item.h"
 
 namespace views {
 class Label;
 }
 
 namespace ash {
-
 struct IMEInfo;
 
-namespace internal {
-
 namespace tray {
 class IMEDefaultView;
 class IMEDetailedView;
 class IMENotificationView;
 }
 
 class TrayItemView;
 
 class TrayIME : public SystemTrayItem,
                 public IMEObserver {
@@ skipping 18 matching lines @@
   // Overridden from IMEObserver.
   virtual void OnIMERefresh() OVERRIDE;
 
   TrayItemView* tray_label_;
   tray::IMEDefaultView* default_;
   tray::IMEDetailedView* detailed_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayIME);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_IME_TRAY_IME_H_