Add a11y virtual keyboard icon when a11y VK is enabled

ui/keyboard/keyboard_controller.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 UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 #define UI_KEYBOARD_KEYBOARD_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/event_types.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 61 matching lines @@
   void NotifyKeyboardBoundsChanging(const gfx::Rect& new_bounds);
 
   // Management of the observer list.
   virtual void AddObserver(KeyboardControllerObserver* observer);
   virtual void RemoveObserver(KeyboardControllerObserver* observer);
 
   KeyboardControllerProxy* proxy() { return proxy_.get(); }
 
   void set_lock_keyboard(bool lock) { lock_keyboard_ = lock; }
 
+  // Force the keyboard to show up if not showing and lock the keyboard.
+  void ShowAndLockKeyboard();
+
  private:
   // For access to Observer methods for simulation.
   friend class KeyboardControllerTest;
 
   // aura::WindowObserver overrides
   virtual void OnWindowHierarchyChanged(
       const HierarchyChangeParams& params) OVERRIDE;
 
   // InputMethodObserver overrides
   virtual void OnTextInputTypeChanged(
@@ skipping 32 matching lines @@
   ObserverList<KeyboardControllerObserver> observer_list_;
 
   base::WeakPtrFactory<KeyboardController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyboardController);
 };
 
 }  // namespace keyboard
 
 #endif  // UI_KEYBOARD_KEYBOARD_CONTROLLER_H_