Cleanup CandidateWindowView.

chrome/browser/chromeos/input_method/hidable_area.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 CHROME_BROWSER_CHROMEOS_INPUT_METHOD_HIDABLE_AREA_H_
-#define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_HIDABLE_AREA_H_
-
-#include "base/memory/scoped_ptr.h"
-#include "ui/views/widget/widget.h"
-
-namespace chromeos {
-namespace input_method {
-
-// HidableArea is used as an area to place optional information that can be
-// turned displaying off if it is unnecessary.
-class HidableArea : public views::View {
- public:
-  HidableArea();
-  virtual ~HidableArea();
-
-  // Sets the content view.
-  void SetContents(views::View* contents);
-
-  // Shows the content.
-  void Show();
-
-  // Hides the content.
-  void Hide();
-
-  // Returns whether the content is already set and shown.
-  bool IsShown() const;
-
-  // Returns the content.
-  views::View* contents() {
-    return contents_.get();
-  }
-
- private:
-  scoped_ptr<views::View> contents_;
-  scoped_ptr<views::View> place_holder_;
-
-  DISALLOW_COPY_AND_ASSIGN(HidableArea);
-};
-
-}  // namespace input_method
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_HIDABLE_AREA_H_