Cleanup CandidateWindowView.

chrome/browser/chromeos/input_method/hidable_area.cc

-// 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.
-
-#include "chrome/browser/chromeos/input_method/hidable_area.h"
-
-#include "ui/views/layout/fill_layout.h"
-
-namespace chromeos {
-namespace input_method {
-
-HidableArea::HidableArea() {
-  place_holder_.reset(new views::View);
-  place_holder_->set_owned_by_client();  // Won't own
-
-  // Initially show nothing.
-  SetLayoutManager(new views::FillLayout);
-  AddChildView(place_holder_.get());
-}
-
-HidableArea::~HidableArea() {
-}
-
-void HidableArea::SetContents(views::View* contents) {
-  contents_.reset(contents);
-  contents_->set_owned_by_client();  // Won't own
-}
-
-void HidableArea::Show() {
-  if (contents_.get() && contents_->parent() != this) {
-    RemoveAllChildViews(false);  // Don't delete child views.
-    AddChildView(contents_.get());
-  }
-}
-
-void HidableArea::Hide() {
-  if (IsShown()) {
-    RemoveAllChildViews(false);  // Don't delete child views.
-    AddChildView(place_holder_.get());
-  }
-}
-
-bool HidableArea::IsShown() const {
-  return contents_.get() && contents_->parent() == this;
-}
-
-}  // namespace input_method
-}  // namespace chromeos