Eliminate ash::internal namespace

ash/wm/always_on_top_controller.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 "ash/wm/always_on_top_controller.h"
 
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
 
 namespace ash {
-namespace internal {
 
 AlwaysOnTopController::AlwaysOnTopController()
     : always_on_top_container_(NULL) {
 }
 
 AlwaysOnTopController::~AlwaysOnTopController() {
   if (always_on_top_container_)
     always_on_top_container_->RemoveObserver(this);
 }
 
@@ skipping 37 matching lines @@
     if (window->parent() != container)
       container->AddChild(window);
   }
 }
 
 void AlwaysOnTopController::OnWindowDestroyed(aura::Window* window) {
   if (window == always_on_top_container_)
     always_on_top_container_ = NULL;
 }
 
-}  // namespace internal
 }  // namespace ash