Eliminate ash::internal namespace

ash/system/user/tray_user.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_USER_TRAY_USER_H_
 #define ASH_SYSTEM_USER_TRAY_USER_H_
 
 #include "ash/ash_export.h"
 #include "ash/session_state_delegate.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "ash/system/user/user_observer.h"
 #include "base/compiler_specific.h"
 
 namespace gfx {
 class Rect;
 class Size;
 }
 
 namespace views {
 class ImageView;
 class Label;
 }
 
 namespace ash {
-namespace internal {
-
 namespace tray {
 class UserView;
 class RoundedImageView;
 }
 
 class ASH_EXPORT TrayUser : public SystemTrayItem,
                             public UserObserver {
  public:
   // The given |multiprofile_index| is the user number in a multi profile
   // scenario. Index #0 is the running user, the other indices are other logged
@@ skipping 53 matching lines @@
   tray::UserView* user_;
 
   // View that contains label and/or avatar.
   views::View* layout_view_;
   tray::RoundedImageView* avatar_;
   views::Label* label_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayUser);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_USER_TRAY_USER_H_