Convert HtmlDialogUIDelegate::GetDialogTitle() to string16.

chrome/browser/ui/webui/html_dialog_ui.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_WEBUI_HTML_DIALOG_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_HTML_DIALOG_UI_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
+#include "base/string16.h"
 #include "chrome/browser/ui/webui/chrome_web_ui.h"
 #include "content/common/property_bag.h"
 #include "googleurl/src/gurl.h"
 
 namespace gfx {
 class Size;
 }
 
 struct ContextMenuParams;
 
 namespace base {
 class ListValue;
 }
 
 // Implement this class to receive notifications.
 class HtmlDialogUIDelegate {
  public:
   // Returns true if the contents needs to be run in a modal dialog.
   virtual bool IsDialogModal() const = 0;
 
   // Returns the title of the dialog.
-  virtual std::wstring GetDialogTitle() const = 0;
+  virtual string16 GetDialogTitle() const = 0;
 
   // Get the HTML file path for the content to load in the dialog.
   virtual GURL GetDialogContentURL() const = 0;
 
   // Get WebUIMessageHandler objects to handle messages from the HTML/JS page.
   // The handlers are used to send and receive messages from the page while it
   // is still open.  Ownership of each handler is taken over by the WebUI
   // hosting the page.
   virtual void GetWebUIMessageHandlers(
       std::vector<WebUIMessageHandler*>* handlers) const = 0;
@@ skipping 76 matching lines @@
 // Intended to be the place to collect the settings and lockdowns
 // necessary for running external UI conponents securely (e.g., the
 // cloud print dialog).
 class ExternalHtmlDialogUI : public HtmlDialogUI {
  public:
   explicit ExternalHtmlDialogUI(TabContents* tab_contents);
   virtual ~ExternalHtmlDialogUI();
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_HTML_DIALOG_UI_H_