Replace more ObserverList with base::ObserverList.

net/proxy/proxy_config_service_mac.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 NET_PROXY_PROXY_CONFIG_SERVICE_MAC_H_
 #define NET_PROXY_PROXY_CONFIG_SERVICE_MAC_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
@@ skipping 47 matching lines @@
   // Methods directly called by the NetworkConfigWatcherMac::Delegate:
   void SetDynamicStoreNotificationKeys(SCDynamicStoreRef store);
   void OnNetworkConfigChange(CFArrayRef changed_keys);
 
   // Called when the proxy configuration has changed, to notify the observers.
   void OnProxyConfigChanged(const ProxyConfig& new_config);
 
   Forwarder forwarder_;
   scoped_ptr<const NetworkConfigWatcherMac> config_watcher_;
 
-  ObserverList<Observer> observers_;
+  base::ObserverList<Observer> observers_;
 
   // Holds the last system proxy settings that we fetched.
   bool has_fetched_config_;
   ProxyConfig last_config_fetched_;
 
   scoped_refptr<Helper> helper_;
 
   // The thread that we expect to be operated on.
   const scoped_refptr<base::SingleThreadTaskRunner> io_thread_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyConfigServiceMac);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_CONFIG_SERVICE_MAC_H_