Convert HtmlDialogUIDelegate::GetDialogTitle() to string16.

chrome/browser/chromeos/login/login_html_dialog.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_CHROMEOS_LOGIN_LOGIN_HTML_DIALOG_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_HTML_DIALOG_H_
 #pragma once
 
 #include <string>
 
@@ skipping 38 matching lines @@
   // Overrides default width/height for dialog.
   void SetDialogSize(int width, int height);
 
   void set_url(const GURL& url) { url_ = url; }
 
   bool is_open() const { return is_open_; }
 
  protected:
   // HtmlDialogUIDelegate implementation.
   virtual bool IsDialogModal() const OVERRIDE;
-  virtual std::wstring GetDialogTitle() const OVERRIDE;
+  virtual string16 GetDialogTitle() const OVERRIDE;
   virtual GURL GetDialogContentURL() const OVERRIDE;
   virtual void GetWebUIMessageHandlers(
       std::vector<WebUIMessageHandler*>* handlers) const OVERRIDE;
   virtual void GetDialogSize(gfx::Size* size) const OVERRIDE;
   virtual std::string GetDialogArgs() const OVERRIDE;
   virtual void OnDialogClosed(const std::string& json_retval) OVERRIDE;
   virtual void OnCloseContents(
       TabContents* source, bool* out_close_dialog) OVERRIDE;
   virtual bool ShouldShowDialogTitle() const OVERRIDE;
   virtual bool HandleContextMenu(const ContextMenuParams& params) OVERRIDE;
 
   // NotificationObserver implementation.
   virtual void Observe(int type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
  private:
   // Notifications receiver.
   Delegate* delegate_;
 
   gfx::NativeWindow parent_window_;
-  std::wstring title_;
+  string16 title_;
   GURL url_;
   Style style_;
   NotificationRegistrar notification_registrar_;
   BubbleFrameView* bubble_frame_view_;
   bool is_open_;
 
   // Dialog display size.
   int width_;
   int height_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginHtmlDialog);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_LOGIN_HTML_DIALOG_H_