Replace more ObserverList with base::ObserverList.

components/ui/zoom/zoom_controller.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 COMPONENTS_UI_ZOOM_ZOOM_CONTROLLER_H_
 #define COMPONENTS_UI_ZOOM_ZOOM_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/gtest_prod_util.h"
@@ skipping 169 matching lines @@
   // Current zoom level.
   double zoom_level_;
 
   scoped_ptr<ZoomChangedEventData> event_data_;
 
   // Keeps track of the extension (if any) that initiated the last zoom change
   // that took effect.
   scoped_refptr<const ZoomRequestClient> last_client_;
 
   // Observer receiving notifications on state changes.
-  ObserverList<ZoomObserver> observers_;
+  base::ObserverList<ZoomObserver> observers_;
 
   content::BrowserContext* browser_context_;
   // Keep track of the HostZoomMap we're currently subscribed to.
   content::HostZoomMap* host_zoom_map_;
 
   scoped_ptr<content::HostZoomMap::Subscription> zoom_subscription_;
 
   DISALLOW_COPY_AND_ASSIGN(ZoomController);
 };
 
 }  // namespace ui_zoom
 
 #endif  // COMPONENTS_UI_ZOOM_ZOOM_CONTROLLER_H_