Remove more wstrings in webkit/tools/test_shell.

webkit/tools/test_shell/test_webview_delegate_gtk.cc

Index: webkit/tools/test_shell/test_webview_delegate_gtk.cc
diff --git a/webkit/tools/test_shell/test_webview_delegate_gtk.cc b/webkit/tools/test_shell/test_webview_delegate_gtk.cc
index e0e39e84d662cafcc8b9f474fee26c44d26e2f76..61a0e0bfbc061ec8af9f4dfeb9e8c6ea695cdbc7 100644
--- a/webkit/tools/test_shell/test_webview_delegate_gtk.cc
+++ b/webkit/tools/test_shell/test_webview_delegate_gtk.cc
@@ -252,10 +252,10 @@ void TestWebViewDelegate::UpdateSelectionClipboard(bool is_empty_selection) {
 
 // Private methods ------------------------------------------------------------
 
-void TestWebViewDelegate::ShowJavaScriptAlert(const std::wstring& message) {
+void TestWebViewDelegate::ShowJavaScriptAlert(const string16& message) {
   GtkWidget* dialog = gtk_message_dialog_new(
       shell_->mainWnd(), GTK_DIALOG_MODAL, GTK_MESSAGE_INFO,
-      GTK_BUTTONS_OK, "%s", WideToUTF8(message).c_str());
+      GTK_BUTTONS_OK, "%s", UTF16ToUTF8(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);