Eliminate ash::internal namespace

ash/wm/resize_shadow_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/resize_shadow_controller.h"
 
 #include <utility>
 
 #include "ash/wm/resize_shadow.h"
 #include "ui/aura/window.h"
 
 namespace ash {
-namespace internal {
 
 ResizeShadowController::ResizeShadowController() {
 }
 
 ResizeShadowController::~ResizeShadowController() {
   for (WindowShadowMap::const_iterator it = window_shadows_.begin();
        it != window_shadows_.end(); ++it) {
     it->first->RemoveObserver(this);
   }
 }
@@ skipping 39 matching lines @@
   // Watch for bounds changes.
   window->AddObserver(this);
   return shadow.get();
 }
 
 ResizeShadow* ResizeShadowController::GetShadowForWindow(aura::Window* window) {
   WindowShadowMap::const_iterator it = window_shadows_.find(window);
   return it != window_shadows_.end() ? it->second.get() : NULL;
 }
 
-}  // namespace internal
 }  // namespace ash