Rework tree APIs to reflect Google style and more const-correctness....

chrome/browser/chromeos/input_method/candidate_window.cc

 // 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.
 
 #include "chrome/browser/chromeos/input_method/candidate_window.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 848 matching lines @@
 
 void CandidateWindowView::ShowAuxiliaryText() {
   views::View* target_area = (
       lookup_table_.orientation == InputMethodLookupTable::kHorizontal ?
       header_area_ : footer_area_);
   views::View* target_contents = (
       lookup_table_.orientation == InputMethodLookupTable::kHorizontal ?
       header_area_contents_.get() :
       footer_area_contents_.get());
 
-  if (!target_area->HasChildView(target_contents)) {
+  if (target_contents->parent() != target_area) {
     // If contents not in display area, put it in.
     target_area->RemoveAllChildViews(false);  // Don't delete child views.
     target_area->AddChildView(target_contents);
   }
 }
 
 void CandidateWindowView::UpdateAuxiliaryText(const std::string& utf8_text) {
   views::Label* target_label = (
       lookup_table_.orientation == InputMethodLookupTable::kHorizontal ?
       header_label_ : footer_label_);
@@ skipping 538 matching lines @@
 
 CandidateWindowController::~CandidateWindowController() {
   delete impl_;
 }
 
 bool CandidateWindowController::Init() {
   return impl_->Init();
 }
 
 }  // namespace chromeos