Oilpan: move ScriptLoader to the heap.

Source/core/dom/PendingScript.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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 110 matching lines @@
     bool isReady() const;
 
 private:
     bool m_watchingForLoad;
     RefPtrWillBeMember<Element> m_element;
     TextPosition m_startingPosition; // Only used for inline script tags.
 
     RefPtr<ScriptStreamer> m_streamer;
 };
 
-}
+} // namespace blink
 
-#endif
+#endif // PendingScript_h