Replace more ObserverList with base::ObserverList.

net/base/sdch_manager.h

 // Copyright (c) 2011 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.
 
 // This file contains the SdchManager class and the DictionarySet
 // nested class.  The manager is responsible for storing all
 // SdchDictionarys, and provides access to them through DictionarySet
 // objects. A DictionarySet is an object whose lifetime is under the
 // control of the consumer. It is a reference to a set of
 // dictionaries, and guarantees that none of those dictionaries will
@@ skipping 230 matching lines @@
   DomainBlacklistInfo blacklisted_domains_;
 
   // List of hostnames for which a latency experiment is allowed (because a
   // round trip test has recently passed).
   ExperimentSet allow_latency_experiment_;
 
   // Observers that want to be notified of SDCH events.
   // Assert list is empty on destruction since if there is an observer
   // that hasn't removed itself from the list, that observer probably
   // has a reference to the SdchManager.
-  ObserverList<SdchObserver, true> observers_;
+  base::ObserverList<SdchObserver, true> observers_;
 
   base::ThreadChecker thread_checker_;
 
   DISALLOW_COPY_AND_ASSIGN(SdchManager);
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_SDCH_MANAGER_H_