Replace more ObserverList with base::ObserverList.

google_apis/gaia/account_tracker.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 GOOGLE_APIS_GAIA_ACCOUNT_TRACKER_H_
 #define GOOGLE_APIS_GAIA_ACCOUNT_TRACKER_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 91 matching lines @@
   void StartTrackingAccount(const std::string account_key);
   void StopTrackingAccount(const std::string account_key);
   void StopTrackingAllAccounts();
   void StartFetchingUserInfo(const std::string account_key);
   void DeleteFetcher(AccountIdFetcher* fetcher);
 
   IdentityProvider* identity_provider_;  // Not owned.
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
   std::map<std::string, AccountIdFetcher*> user_info_requests_;
   std::map<std::string, AccountState> accounts_;
-  ObserverList<Observer> observer_list_;
+  base::ObserverList<Observer> observer_list_;
   bool shutdown_called_;
 };
 
 class AccountIdFetcher : public OAuth2TokenService::Consumer,
                          public gaia::GaiaOAuthClient::Delegate {
  public:
   AccountIdFetcher(OAuth2TokenService* token_service,
                    net::URLRequestContextGetter* request_context_getter,
                    AccountTracker* tracker,
                    const std::string& account_key);
@@ skipping 21 matching lines @@
   AccountTracker* tracker_;
   const std::string account_key_;
 
   scoped_ptr<OAuth2TokenService::Request> login_token_request_;
   scoped_ptr<gaia::GaiaOAuthClient> gaia_oauth_client_;
 };
 
 }  // namespace extensions
 
 #endif  // GOOGLE_APIS_GAIA_ACCOUNT_TRACKER_H_