Fix content settings bubble crash.

chrome/browser/content_settings/tab_specific_content_settings.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_
 #define CHROME_BROWSER_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_
 
 #include <set>
 #include <string>
 
@@ skipping 270 matching lines @@
   void OnContentAccessed(ContentSettingsType type);
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
   // Notifies all registered |SiteDataObserver|s.
   void NotifySiteDataObservers();
 
-  // All currently registered |SiteDataObserver|.
-  ObserverList<SiteDataObserver, true> observer_list_;
+  // All currently registered |SiteDataObserver|s.
+  ObserverList<SiteDataObserver> observer_list_;
 
   // Stores which content setting types actually have blocked content.
   bool content_blocked_[CONTENT_SETTINGS_NUM_TYPES];
 
   // Stores if the blocked content was messaged to the user.
   bool content_blockage_indicated_to_user_[CONTENT_SETTINGS_NUM_TYPES];
 
   // Stores which content setting types actually were accessed.
   bool content_accessed_[CONTENT_SETTINGS_NUM_TYPES];
 
@@ skipping 29 matching lines @@
 
   // Stores whether the user can load blocked plugins on this page.
   bool load_plugins_link_enabled_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(TabSpecificContentSettings);
 };
 
 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_TAB_SPECIFIC_CONTENT_SETTINGS_H_