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

Source/web/DatabaseClientImpl.h

 /*
  * Copyright (C) 2013 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 28 matching lines @@
 class DatabaseClientImpl FINAL : public WebCore::DatabaseClient {
 public:
     static PassOwnPtr<DatabaseClientImpl> create();
 
     virtual ~DatabaseClientImpl();
 
     virtual bool allowDatabase(WebCore::ExecutionContext*, const String& name, const String& displayName, unsigned long estimatedSize) OVERRIDE;
 
     virtual void trace(WebCore::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.
     }
 
 private:
     DatabaseClientImpl();
 };
 
 } // namespace blink
 
 #endif // DatabaseClientImpl_h