Make TabContents own its infobar delegates....

chrome/browser/gtk/translate/translate_infobar_base_gtk.cc

Index: chrome/browser/gtk/translate/translate_infobar_base_gtk.cc
===================================================================
--- chrome/browser/gtk/translate/translate_infobar_base_gtk.cc	(revision 65711)
+++ chrome/browser/gtk/translate/translate_infobar_base_gtk.cc	(working copy)
@@ -179,10 +179,6 @@
   return id;
 }
 
-TranslateInfoBarDelegate* TranslateInfoBarBase::GetDelegate() const {
-  return static_cast<TranslateInfoBarDelegate*>(delegate());
-}
-
 // static
 GtkWidget* TranslateInfoBarBase::BuildOptionsMenuButton() {
   GtkWidget* button = gtk_button_new();
@@ -205,6 +201,8 @@
 }
 
 void TranslateInfoBarBase::OnOptionsClicked(GtkWidget* sender) {
+  if (!delegate())
+    return;
   if (!options_menu_model_.get()) {
     options_menu_model_.reset(new OptionsMenuModel(GetDelegate()));
     options_menu_menu_.reset(new MenuGtk(NULL, options_menu_model_.get()));