Eliminate ash::internal namespace

ash/wm/root_window_layout_manager.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/root_window_layout_manager.h"
 
 #include "ash/desktop_background/desktop_background_widget_controller.h"
 #include "ash/root_window_controller.h"
 #include "ash/root_window_settings.h"
 #include "ui/aura/window_event_dispatcher.h"
 #include "ui/compositor/layer.h"
 #include "ui/views/widget/widget.h"
 
 namespace ash {
-namespace internal {
 
 ////////////////////////////////////////////////////////////////////////////////
 // RootWindowLayoutManager, public:
 
 RootWindowLayoutManager::RootWindowLayoutManager(aura::Window* owner)
     : owner_(owner) {
 }
 
 RootWindowLayoutManager::~RootWindowLayoutManager() {
 }
@@ skipping 46 matching lines @@
     aura::Window* child,
     bool visible) {
 }
 
 void RootWindowLayoutManager::SetChildBounds(
     aura::Window* child,
     const gfx::Rect& requested_bounds) {
   SetChildBoundsDirect(child, requested_bounds);
 }
 
-}  // namespace internal
 }  // namespace ash