Replace more ObserverList with base::ObserverList.

components/favicon/core/favicon_driver.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_FAVICON_CORE_FAVICON_DRIVER_H_
 #define COMPONENTS_FAVICON_CORE_FAVICON_DRIVER_H_
 
 #include "base/macros.h"
 #include "base/observer_list.h"
 #include "base/strings/string16.h"
@@ skipping 97 matching lines @@
   // Informs FaviconDriverObservers that favicon |image| has been retrieved from
   // either website or cached storage.
   void NotifyFaviconAvailable(const gfx::Image& image);
 
   // Informs FaviconDriverObservers that favicon has changed for the current
   // page. |icon_url_changed| is true if the favicon URL has also changed since
   // the last call.
   virtual void NotifyFaviconUpdated(bool icon_url_changed);
 
  private:
-  ObserverList<FaviconDriverObserver> observer_list_;
+  base::ObserverList<FaviconDriverObserver> observer_list_;
 
   DISALLOW_COPY_AND_ASSIGN(FaviconDriver);
 };
 
 }  // namespace favicon
 
 #endif  // COMPONENTS_FAVICON_CORE_FAVICON_DRIVER_H_