Oilpan: Move WorkerClients to the managed heap and trace its supplements.

Source/modules/filesystem/LocalFileSystem.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 41 matching lines @@
     void requestFileSystem(ExecutionContext*, FileSystemType, long long size, PassOwnPtr<AsyncFileSystemCallbacks>);
     void deleteFileSystem(ExecutionContext*, FileSystemType, PassOwnPtr<AsyncFileSystemCallbacks>);
 
     FileSystemClient* client() { return m_client.get(); }
 
     static const char* supplementName();
     static LocalFileSystem* from(ExecutionContext&);
 
     virtual void trace(Visitor*) OVERRIDE
     {
-        // FIXME: Oilpan: Move Page and WorkerClients to the managed heap before using this trace method.
+        // FIXME: Oilpan: Move Page to the managed heap before using this trace method.
     }
 
 protected:
     explicit LocalFileSystem(PassOwnPtr<FileSystemClient>);
 
     OwnPtr<FileSystemClient> m_client;
 };
 
 } // namespace WebCore
 
 #endif // LocalFileSystem_h