Eliminate ash::internal namespace

ash/wm/dock/docked_window_layout_manager.h

 // Copyright (c) 2013 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_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_
 #define ASH_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_
 
 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_layout_manager_observer.h"
 #include "ash/shell_observer.h"
@@ skipping 20 matching lines @@
 
 namespace gfx {
 class Point;
 }
 
 namespace views {
 class Widget;
 }
 
 namespace ash {
-class Shelf;
-
-namespace internal {
 class DockedBackgroundWidget;
 class DockedWindowLayoutManagerObserver;
 class DockedWindowResizerTest;
+class Shelf;
 class ShelfLayoutManager;
 class WorkspaceController;
 
 struct WindowWithHeight {
   explicit WindowWithHeight(aura::Window* window) :
     window_(window),
     height_(window->bounds().height()) { }
   aura::Window* window() { return window_; }
   const aura::Window* window() const { return window_; }
   aura::Window* window_;
@@ skipping 246 matching lines @@
 
   // Widget used to paint a background for the docked area.
   scoped_ptr<DockedBackgroundWidget> background_widget_;
 
   // Observers of dock bounds changes.
   ObserverList<DockedWindowLayoutManagerObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(DockedWindowLayoutManager);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_WM_DOCK_DOCKED_WINDOW_LAYOUT_MANAGER_H_