Replace more ObserverList with base::ObserverList.

components/signin/core/browser/gaia_cookie_manager_service.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_SIGNIN_CORE_BROWSER_GAIA_COOKIE_MANAGER_SERVICE_H
 #define COMPONENTS_SIGNIN_CORE_BROWSER_GAIA_COOKIE_MANAGER_SERVICE_H
 
 #include <deque>
 
 #include "base/observer_list.h"
@@ skipping 249 matching lines @@
   scoped_ptr<SigninClient::CookieChangedSubscription>
       cookie_changed_subscription_;
 
   // A worklist for this class. Stores any pending requests that couldn't be
   // executed right away, since this class only permits one request to be
   // executed at a time.
   std::deque<GaiaCookieRequest> requests_;
 
   // List of observers to notify when merge session completes.
   // Makes sure list is empty on destruction.
-  ObserverList<Observer, true> observer_list_;
+  base::ObserverList<Observer, true> observer_list_;
 
   // Source to use with GAIA endpoints for accounting.
   std::string source_;
 
   // True once the ExternalCCResultFetcher has completed once.
   bool external_cc_result_fetched_;
 
   std::vector<std::pair<std::string, bool> > listed_accounts_;
 
   bool list_accounts_fetched_once_;
 
   DISALLOW_COPY_AND_ASSIGN(GaiaCookieManagerService);
 };
 
 #endif  // COMPONENTS_SIGNIN_CORE_BROWSER_GAIA_COOKIE_MANAGER_SERVICE_H