wstring: convert all SetPageTitle APIs to use string16

webkit/tools/test_shell/test_webview_delegate_gtk.cc

 // Copyright (c) 2010 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.
 
 // This file was forked off the Mac port.
 
 #include "webkit/tools/test_shell/test_webview_delegate.h"
 
 #include <gtk/gtk.h>
 #include <gdk/gdkx.h>
@@ skipping 242 matching lines @@
 
 void TestWebViewDelegate::ShowJavaScriptAlert(const std::wstring& message) {
   GtkWidget* dialog = gtk_message_dialog_new(
       shell_->mainWnd(), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO,
       GTK_BUTTONS_OK, "%s", WideToUTF8(message).c_str());
   gtk_window_set_title(GTK_WINDOW(dialog), "JavaScript Alert");
   gtk_dialog_run(GTK_DIALOG(dialog));  // Runs a nested message loop.
   gtk_widget_destroy(dialog);
 }
 
-void TestWebViewDelegate::SetPageTitle(const std::wstring& title) {
+void TestWebViewDelegate::SetPageTitle(const string16& title) {
   gtk_window_set_title(GTK_WINDOW(shell_->mainWnd()),
-                       ("Test Shell - " + WideToUTF8(title)).c_str());
+                       ("Test Shell - " + UTF16ToUTF8(title)).c_str());
 }
 
 void TestWebViewDelegate::SetAddressBarURL(const GURL& url) {
   gtk_entry_set_text(GTK_ENTRY(shell_->editWnd()), url.spec().c_str());
 }