Eliminate ash::internal namespace

ash/shelf/shelf_layout_manager.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_SHELF_SHELF_LAYOUT_MANAGER_H_
 #define ASH_SHELF_SHELF_LAYOUT_MANAGER_H_
 
 #include <vector>
 
 #include "ash/ash_export.h"
@@ skipping 20 matching lines @@
 namespace aura {
 class RootWindow;
 }
 
 namespace ui {
 class GestureEvent;
 class ImplicitAnimationObserver;
 }
 
 namespace ash {
+class PanelLayoutManagerTest;
 class ScreenAsh;
+class ShelfBezelEventFilter;
 class ShelfLayoutManagerObserver;
+class ShelfLayoutManagerTest;
 class ShelfWidget;
-FORWARD_DECLARE_TEST(WebNotificationTrayTest, PopupAndFullscreen);
-
-namespace internal {
-
-class PanelLayoutManagerTest;
-class ShelfBezelEventFilter;
-class ShelfLayoutManagerTest;
 class StatusAreaWidget;
 class WorkspaceController;
+FORWARD_DECLARE_TEST(WebNotificationTrayTest, PopupAndFullscreen);
 
 // ShelfLayoutManager is the layout manager responsible for the shelf and
 // status widgets. The shelf is given the total available width and told the
 // width of the status area. This allows the shelf to draw the background and
 // layout to the status area.
 // To respond to bounds changes in the status area StatusAreaLayoutManager works
 // closely with ShelfLayoutManager.
 class ASH_EXPORT ShelfLayoutManager :
     public aura::LayoutManager,
     public ash::ShellObserver,
@@ skipping 347 matching lines @@
 
   // The bounds of the dock.
   gfx::Rect dock_bounds_;
 
   // The show hide animation duration override or 0 for default.
   int duration_override_in_ms_;
 
   DISALLOW_COPY_AND_ASSIGN(ShelfLayoutManager);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SHELF_SHELF_LAYOUT_MANAGER_H_