Make infobars ignore button clicks when closing.

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

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/gtk/infobars/before_translate_infobar_gtk.h"
 
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/translate/translate_infobar_delegate.h"
 #include "chrome/browser/ui/gtk/gtk_util.h"
 #include "grit/generated_resources.h"
@@ skipping 27 matching lines @@
                              GetDelegate()->target_language_index());
   g_signal_connect(combobox, "changed",
                    G_CALLBACK(&OnLanguageModifiedThunk), this);
   gtk_box_pack_start(GTK_BOX(hbox), combobox, FALSE, FALSE, 0);
   gtk_box_pack_start(GTK_BOX(hbox),
                      CreateLabel(UTF16ToUTF8(text.substr(offset))),
                      FALSE, FALSE, 0);
 
   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();
   if (delegate->ShouldShowNeverTranslateButton()) {
     std::string label =
         l10n_util::GetStringFUTF8(IDS_TRANSLATE_INFOBAR_NEVER_TRANSLATE,
                                   delegate->GetLanguageDisplayableNameAt(
                                       delegate->original_language_index()));
     button = gtk_button_new_with_label(label.c_str());
     g_signal_connect(button, "clicked",
@@ skipping 11 matching lines @@
                      G_CALLBACK(&OnAlwaysTranslatePressedThunk), this);
     gtk_box_pack_start(GTK_BOX(hbox), button, FALSE, FALSE, 0);
   }
 }
 
 bool BeforeTranslateInfoBar::ShowOptionsMenuButton() const {
   return true;
 }
 
 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;
 
   GetDelegate()->SetOriginalLanguage(index);
 }
 
 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();
 }