Replace more ObserverList with base::ObserverList.

content/browser/gpu/gpu_data_manager_impl_private.h

 // Copyright (c) 2013 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 CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_PRIVATE_H_
 #define CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_PRIVATE_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 151 matching lines @@
                            GpuDriverBugListMultiple);
   FRIEND_TEST_ALL_PREFIXES(GpuDataManagerImplPrivateTest,
                            BlacklistAllFeatures);
 
   struct DomainBlockEntry {
     GpuDataManagerImpl::DomainGuilt last_guilt;
   };
 
   typedef std::map<std::string, DomainBlockEntry> DomainBlockMap;
 
-  typedef ObserverListThreadSafe<GpuDataManagerObserver>
+  typedef base::ObserverListThreadSafe<GpuDataManagerObserver>
       GpuDataManagerObserverList;
 
   struct LogMessage {
     int level;
     std::string header;
     std::string message;
 
     LogMessage(int _level,
                const std::string& _header,
                const std::string& _message)
@@ skipping 92 matching lines @@
   bool finalized_;
 
   std::string disabled_extensions_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuDataManagerImplPrivate);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_GPU_GPU_DATA_MANAGER_IMPL_PRIVATE_H_