Destroy the GTK info bar container widget when the object is destroyed.

chrome/browser/gtk/infobar_container_gtk.cc

 // Copyright (c) 2009 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/gtk/infobar_container_gtk.h"
 
 #include <gtk/gtk.h>
 
 #include "base/gfx/gtk_util.h"
 #include "chrome/browser/browser_window.h"
@@ skipping 28 matching lines @@
 InfoBarContainerGtk::InfoBarContainerGtk(BrowserWindow* browser_window)
     : browser_window_(browser_window),
       tab_contents_(NULL),
       container_(gtk_vbox_new(FALSE, 0)) {
   gtk_widget_show(container_.get());
 }
 
 InfoBarContainerGtk::~InfoBarContainerGtk() {
   browser_window_ = NULL;
   ChangeTabContents(NULL);
+
+  container_.Destroy();
 }
 
 void InfoBarContainerGtk::ChangeTabContents(TabContents* contents) {
   if (tab_contents_) {
     NotificationService::current()->RemoveObserver(
         this, NotificationType::TAB_CONTENTS_INFOBAR_ADDED,
         Source<TabContents>(tab_contents_));
     NotificationService::current()->RemoveObserver(
         this, NotificationType::TAB_CONTENTS_INFOBAR_REMOVED,
         Source<TabContents>(tab_contents_));
@@ skipping 50 matching lines @@
   else
     infobar->Open();
 }
 
 void InfoBarContainerGtk::RemoveInfoBar(InfoBarDelegate* delegate) {
   RemoveInfoBarData remove_info_bar_data = { container_.get(), delegate };
 
   gtk_container_foreach(GTK_CONTAINER(container_.get()),
                         AnimateClosingForDelegate, &remove_info_bar_data);
 }