Remove virtual keyboard support.

chrome/browser/ui/virtual_keyboard/virtual_keyboard_manager.h

-// Copyright (c) 2011 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 CHROME_BROWSER_UI_VIRTUAL_KEYBOARD_VIRTUAL_KEYBOARD_MANAGER_H_
-#define CHROME_BROWSER_UI_VIRTUAL_KEYBOARD_VIRTUAL_KEYBOARD_MANAGER_H_
-#pragma once
-
-#include "base/memory/singleton.h"
-#include "ui/views/widget/widget.h"
-
-class KeyboardWidget;
-
-// A singleton object to manage the virtual keyboard.
-class VirtualKeyboardManager : public views::Widget::Observer {
- public:
-  // Returns the singleton object.
-  static VirtualKeyboardManager* GetInstance();
-
-  // Shows the keyboard for the target widget. The events from the keyboard will
-  // be sent to |widget|.
-  // TODO(sad): Allow specifying the type of keyboard to show.
-  void ShowKeyboardForWidget(views::Widget* widget);
-
-  // Hides the keyboard.
-  void Hide();
-
-  // Returns the keyboard Widget.
-  views::Widget* keyboard();
-
- private:
-  friend struct DefaultSingletonTraits<VirtualKeyboardManager>;
-
-  VirtualKeyboardManager();
-  virtual ~VirtualKeyboardManager();
-
-  // Overridden from views::Widget::Observer.
-  virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
-
-  KeyboardWidget* keyboard_;
-
-  DISALLOW_COPY_AND_ASSIGN(VirtualKeyboardManager);
-};
-
-#endif  // CHROME_BROWSER_UI_VIRTUAL_KEYBOARD_VIRTUAL_KEYBOARD_MANAGER_H_