Make TabContents own its infobar delegates....

chrome/browser/ui/views/infobars/after_translate_infobar.cc

Index: chrome/browser/ui/views/infobars/after_translate_infobar.cc
===================================================================
--- chrome/browser/ui/views/infobars/after_translate_infobar.cc	(revision 65711)
+++ chrome/browser/ui/views/infobars/after_translate_infobar.cc	(working copy)
@@ -117,15 +117,21 @@
 
 void AfterTranslateInfoBar::ButtonPressed(views::Button* sender,
                                           const views::Event& event) {
-  if (sender == revert_button_) {
+  if (delegate() && (sender == revert_button_)) {
     GetDelegate()->RevertTranslation();
     return;
   }
+
   TranslateInfoBarBase::ButtonPressed(sender, event);
 }
 
 void AfterTranslateInfoBar::RunMenu(views::View* source,
                                     const gfx::Point& pt) {
+  if (!delegate())
+    return;
+  // TODO(pkasting): What if the InfoBarDelegate is closed while the menu is
+  // open?  Then the menu models may deref garbage delegate pointers.
+
   if (source == original_language_menu_button_) {
     if (!original_language_menu_.get()) {
       original_language_menu_.reset(