Remove more keyboard usability related code

ash/root_window_controller.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_ROOT_WINDOW_CONTROLLER_H_
 #define ASH_ROOT_WINDOW_CONTROLLER_H_
 
 #include <map>
 
 #include "ash/ash_export.h"
@@ skipping 224 matching lines @@
   // Deactivate virtual keyboard on current root window controller.
   void DeactivateKeyboard(keyboard::KeyboardController* keyboard_controller);
 
   // Tests if a window is associated with the virtual keyboard.
   bool IsVirtualKeyboardWindow(aura::Window* window);
 
  private:
   explicit RootWindowController(AshWindowTreeHost* host);
   enum RootWindowType {
     PRIMARY,
-    SECONDARY,
-    VIRTUAL_KEYBOARD
+    SECONDARY
   };
 
   // Initializes the RootWindowController.  |is_primary| is true if
   // the controller is for primary display.  |first_run_after_boot| is
   // set to true only for primary root window after boot.
   void Init(RootWindowType root_window_type, bool first_run_after_boot);
 
   void InitLayoutManagers();
 
   // Initializes |system_background_| and possibly also |boot_splash_screen_|.
@@ skipping 64 matching lines @@
 };
 
 
 // Gets the RootWindowController for |root_window|.
 ASH_EXPORT RootWindowController* GetRootWindowController(
     const aura::Window* root_window);
 
 }  // namespace ash
 
 #endif  // ASH_ROOT_WINDOW_CONTROLLER_H_