Convert HtmlDialogUIDelegate::GetDialogTitle() to string16.

chrome/browser/ui/webui/certificate_viewer.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_CERTIFICATE_VIEWER_H_
 #define CHROME_BROWSER_UI_WEBUI_CERTIFICATE_VIEWER_H_
 #pragma once
 
 #include "chrome/browser/ui/webui/html_dialog_ui.h"
 #include "net/base/x509_certificate.h"
@@ skipping 14 matching lines @@
                          net::X509Certificate* cert);
 
  private:
   // Construct a certificate viewer for the passed in certificate. A reference
   // to the certificate pointer is added for the lifetime of the certificate
   // viewer.
   explicit CertificateViewerDialog(net::X509Certificate* cert);
 
   // Overridden from HtmlDialogUI::Delegate:
   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;
 
   // The certificate being viewed.
   scoped_refptr<net::X509Certificate> cert_;
 
   // The argument string for the dialog which passes the certificate pointer.
   std::string json_args_;
 
   // The title of the certificate viewer dialog, Certificate Viewer: CN.
-  std::wstring title_;
+  string16 title_;
 
   DISALLOW_COPY_AND_ASSIGN(CertificateViewerDialog);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_CERTIFICATE_VIEWER_H_