Migrate CandidateWindow::Entry to string16.

chrome/browser/chromeos/input_method/candidate_window_controller_impl.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/candidate_window_controller_impl.h"
 
 #include <string>
 #include <vector>
 
 #include "ash/ime/infolist_window.h"
@@ skipping 134 matching lines @@
   } else {
     infolist_window_ = new ash::ime::InfolistWindow(
         candidate_window_view_, infolist_entries);
     infolist_window_->InitWidget();
     infolist_window_->GetWidget()->AddObserver(this);
   }
   infolist_window_->ShowWithDelay();
 }
 
 void CandidateWindowControllerImpl::UpdatePreeditText(
-    const std::string& utf8_text, unsigned int cursor, bool visible) {
+    const base::string16& text, unsigned int cursor, bool visible) {
   // If it's not visible, hide the preedit text and return.
-  if (!visible || utf8_text.empty()) {
+  if (!visible || text.empty()) {
     if (candidate_window_view_)
       candidate_window_view_->HidePreeditText();
     return;
   }
   if (!candidate_window_view_)
     InitCandidateWindowView();
-  candidate_window_view_->UpdatePreeditText(utf8_text);
+  candidate_window_view_->UpdatePreeditText(text);
   candidate_window_view_->ShowPreeditText();
 }
 
 void CandidateWindowControllerImpl::OnCandidateCommitted(int index) {
   FOR_EACH_OBSERVER(CandidateWindowController::Observer, observers_,
                     CandidateClicked(index));
 }
 
 void CandidateWindowControllerImpl::OnWidgetClosing(views::Widget* widget) {
   if (infolist_window_ && widget == infolist_window_->GetWidget()) {
@@ skipping 14 matching lines @@
   observers_.AddObserver(observer);
 }
 
 void CandidateWindowControllerImpl::RemoveObserver(
     CandidateWindowController::Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
 }  // namespace input_method
 }  // namespace chromeos