Convert HtmlDialogUIDelegate::GetDialogTitle() to string16.

chrome/browser/chromeos/choose_mobile_network_dialog.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/choose_mobile_network_dialog.h"
 
 #include "chrome/browser/chromeos/frame/bubble_window.h"
 #include "chrome/browser/chromeos/login/user_manager.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 30 matching lines @@
   html_view->GetWidget()->Show();
 }
 
 ChooseMobileNetworkDialog::ChooseMobileNetworkDialog() {
 }
 
 bool ChooseMobileNetworkDialog::IsDialogModal() const {
   return true;
 }
 
-std::wstring ChooseMobileNetworkDialog::GetDialogTitle() const {
-  return std::wstring();
+string16 ChooseMobileNetworkDialog::GetDialogTitle() const {
+  return string16();
 }
 
 GURL ChooseMobileNetworkDialog::GetDialogContentURL() const {
   return GURL(chrome::kChromeUIChooseMobileNetworkURL);
 }
 
 void ChooseMobileNetworkDialog::GetWebUIMessageHandlers(
     std::vector<WebUIMessageHandler*>* handlers) const {
 }
 
@@ skipping 19 matching lines @@
   return false;
 }
 
 bool ChooseMobileNetworkDialog::HandleContextMenu(
     const ContextMenuParams& params) {
   // Disable context menu.
   return true;
 }
 
 }  // namespace chromeos