Eliminate ash::internal namespace

ash/display/virtual_keyboard_window_controller.h

 // Copyright 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_DISPLAY_VIRTUAL_KEYBOARD_WINDOW_CONTROLLER_H_
 #define ASH_DISPLAY_VIRTUAL_KEYBOARD_WINDOW_CONTROLLER_H_
 
 #include "ash/ash_export.h"
 #include "ash/shell_observer.h"
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/gfx/display.h"
 
 namespace keyboard {
 class KeyboardController;
 }
 
 namespace ash {
+class DisplayInfo;
+class RootWindowController;
 
 namespace test {
 class VirtualKeyboardWindowControllerTest;
 }  // namespace test
 
-namespace internal {
-class DisplayInfo;
-class RootWindowController;
-
 // This class maintains the RootWindowController dedicated for
 // virtual keyboard.
 class ASH_EXPORT VirtualKeyboardWindowController : public ShellObserver {
  public:
   VirtualKeyboardWindowController();
   virtual ~VirtualKeyboardWindowController();
 
   void ActivateKeyboard(keyboard::KeyboardController* keyboard_controller);
 
   // Updates the root window's bounds using |display_info|.
@@ skipping 15 matching lines @@
 
   RootWindowController* root_window_controller_for_test() {
     return root_window_controller_.get();
   }
 
   scoped_ptr<RootWindowController> root_window_controller_;
 
   DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardWindowController);
 };
 
-}  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_DISPLAY_VIRTUAL_KEYBOARD_WINDOW_CONTROLLER_H_