Convert HtmlDialogUIDelegate::GetDialogTitle() to string16.

chrome/browser/ui/gtk/html_dialog_gtk.cc

Index: chrome/browser/ui/gtk/html_dialog_gtk.cc
diff --git a/chrome/browser/ui/gtk/html_dialog_gtk.cc b/chrome/browser/ui/gtk/html_dialog_gtk.cc
index 82216b2a24467a730682d9a0589a8ab12608b45b..ec064b068f6af30431adbde61370a06212afab7a 100644
--- a/chrome/browser/ui/gtk/html_dialog_gtk.cc
+++ b/chrome/browser/ui/gtk/html_dialog_gtk.cc
@@ -71,8 +71,8 @@ bool HtmlDialogGtk::IsDialogModal() const {
   return delegate_ ? delegate_->IsDialogModal() : false;
 }
 
-std::wstring HtmlDialogGtk::GetDialogTitle() const {
-  return delegate_ ? delegate_->GetDialogTitle() : L"";
+string16 HtmlDialogGtk::GetDialogTitle() const {
+  return delegate_ ? delegate_->GetDialogTitle() : string16();
 }
 
 GURL HtmlDialogGtk::GetDialogContentURL() const {
@@ -172,7 +172,7 @@ gfx::NativeWindow HtmlDialogGtk::InitDialog() {
     flags = static_cast<GtkDialogFlags>(flags | GTK_DIALOG_MODAL);
 
   dialog_ = gtk_dialog_new_with_buttons(
-      WideToUTF8(delegate_->GetDialogTitle()).c_str(),
+      UTF16ToUTF8(delegate_->GetDialogTitle()).c_str(),
       parent_window_,
       flags,
       NULL);