Replace more ObserverList with base::ObserverList.

ppapi/host/ppapi_host.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 PPAPI_HOST_PPAPI_HOST_H_
 #define PPAPI_HOST_PPAPI_HOST_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 105 matching lines @@
   void OnHostMsgResourceDestroyed(PP_Resource resource);
 
   // Non-owning pointer.
   IPC::Sender* sender_;
 
   PpapiPermissions permissions_;
 
   // Filters for resource creation messages. Note that since we don't support
   // deleting these dynamically we don't need to worry about modifications
   // during iteration. If we add that capability, this should be replaced with
-  // an ObserverList.
+  // an base::ObserverList.
   ScopedVector<HostFactory> host_factory_filters_;
 
   // Filters for instance messages. Note that since we don't support deleting
   // these dynamically we don't need to worry about modifications during
   // iteration. If we add that capability, this should be replaced with an
-  // ObserverList.
+  // base::ObserverList.
   ScopedVector<InstanceMessageFilter> instance_message_filters_;
 
   typedef std::map<PP_Resource, linked_ptr<ResourceHost> > ResourceMap;
   ResourceMap resources_;
 
   // Resources that have been created in the host and have not yet had the
   // corresponding PluginResource associated with them.
   // See PpapiHostMsg_AttachToPendingHost.
   typedef std::map<int, linked_ptr<ResourceHost> > PendingHostResourceMap;
   PendingHostResourceMap pending_resource_hosts_;
   int next_pending_resource_host_id_;
 
   DISALLOW_COPY_AND_ASSIGN(PpapiHost);
 };
 
 }  // namespace host
 }  // namespace ppapi
 
 #endif  // PPAPI_HOST_PPAPIE_HOST_H_