Replace more ObserverList with base::ObserverList.

components/infobars/core/infobar_manager.h

 // Copyright 2014 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 COMPONENTS_INFOBARS_CORE_INFOBAR_MANAGER_H_
 #define COMPONENTS_INFOBARS_CORE_INFOBAR_MANAGER_H_
 
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
@@ skipping 102 matching lines @@
   // directly once they've been added to this; instead, when we're done with an
   // infobar, we instruct it to delete itself and then orphan it.  See
   // RemoveInfoBarInternal().
   typedef std::vector<InfoBar*> InfoBars;
 
   void RemoveInfoBarInternal(InfoBar* infobar, bool animate);
 
   InfoBars infobars_;
   bool infobars_enabled_;
 
-  ObserverList<Observer, true> observer_list_;
+  base::ObserverList<Observer, true> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarManager);
 };
 
 }  // namespace infobars
 
 #endif  // COMPONENTS_INFOBARS_CORE_INFOBAR_MANAGER_H_