Make infobars ignore button clicks when closing.

chrome/browser/ui/gtk/infobars/before_translate_infobar_gtk.cc

Index: chrome/browser/ui/gtk/infobars/before_translate_infobar_gtk.cc
===================================================================
--- chrome/browser/ui/gtk/infobars/before_translate_infobar_gtk.cc	(revision 102206)
+++ chrome/browser/ui/gtk/infobars/before_translate_infobar_gtk.cc	(working copy)
@@ -45,12 +45,12 @@
 
   GtkWidget* button = gtk_button_new_with_label(
       l10n_util::GetStringUTF8(IDS_TRANSLATE_INFOBAR_ACCEPT).c_str());
-  g_signal_connect(button, "clicked",G_CALLBACK(&OnAcceptPressedThunk), this);
+  g_signal_connect(button, "clicked", G_CALLBACK(&OnAcceptPressedThunk), this);
   gtk_box_pack_start(GTK_BOX(hbox), button, FALSE, FALSE, 0);
 
   button = gtk_button_new_with_label(
       l10n_util::GetStringUTF8(IDS_TRANSLATE_INFOBAR_DENY).c_str());
-  g_signal_connect(button, "clicked",G_CALLBACK(&OnDenyPressedThunk), this);
+  g_signal_connect(button, "clicked", G_CALLBACK(&OnDenyPressedThunk), this);
   gtk_box_pack_start(GTK_BOX(hbox), button, FALSE, FALSE, 0);
 
   TranslateInfoBarDelegate* delegate = GetDelegate();
@@ -82,6 +82,8 @@
 }
 
 void BeforeTranslateInfoBar::OnLanguageModified(GtkWidget* sender) {
+  if (!owned())
+    return;  // We're closing; don't call anything, it might access the owner.
   size_t index = GetLanguageComboboxActiveId(GTK_COMBO_BOX(sender));
   if (index == GetDelegate()->original_language_index())
     return;
@@ -90,18 +92,26 @@
 }
 
 void BeforeTranslateInfoBar::OnAcceptPressed(GtkWidget* sender) {
+  if (!owned())
+    return;  // We're closing; don't call anything, it might access the owner.
   GetDelegate()->Translate();
 }
 
 void BeforeTranslateInfoBar::OnDenyPressed(GtkWidget* sender) {
+  if (!owned())
+    return;  // We're closing; don't call anything, it might access the owner.
   GetDelegate()->TranslationDeclined();
   RemoveSelf();
 }
 
 void BeforeTranslateInfoBar::OnNeverTranslatePressed(GtkWidget* sender) {
+  if (!owned())
+    return;  // We're closing; don't call anything, it might access the owner.
   GetDelegate()->NeverTranslatePageLanguage();
 }
 
 void BeforeTranslateInfoBar::OnAlwaysTranslatePressed(GtkWidget* sender) {
+  if (!owned())
+    return;  // We're closing; don't call anything, it might access the owner.
   GetDelegate()->AlwaysTranslatePageLanguage();
 }