Convert HtmlDialogUIDelegate::GetDialogTitle() to string16.

chrome/browser/printing/print_dialog_cloud.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/printing/print_dialog_cloud.h"
 #include "chrome/browser/printing/print_dialog_cloud_internal.h"
 
 #include "base/base64.h"
 #include "base/command_line.h"
 #include "base/file_util.h"
@@ skipping 439 matching lines @@
   flow_handler_->SetDialogDelegate(NULL);
   if (owns_flow_handler_) {
     delete flow_handler_;
   }
 }
 
 bool CloudPrintHtmlDialogDelegate::IsDialogModal() const {
     return modal_;
 }
 
-std::wstring CloudPrintHtmlDialogDelegate::GetDialogTitle() const {
-  return std::wstring();
+string16 CloudPrintHtmlDialogDelegate::GetDialogTitle() const {
+  return string16();
 }
 
 GURL CloudPrintHtmlDialogDelegate::GetDialogContentURL() const {
   return params_.url;
 }
 
 void CloudPrintHtmlDialogDelegate::GetWebUIMessageHandlers(
     std::vector<WebUIMessageHandler*>* handlers) const {
   handlers->push_back(flow_handler_);
   // We don't own flow_handler_ anymore, but it sticks around until at
@@ skipping 156 matching lines @@
                                                    print_job_title,
                                                    file_type,
                                                    false);
       return true;
     }
   }
   return false;
 }
 
 }  // end namespace