Oilpan: move Screen and its supplement to the oilpan heap.

Source/core/frame/Screen.cpp

 /*
  * Copyright (C) 2007 Apple 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
@@ skipping 114 matching lines @@
     return EventTargetNames::Screen;
 }
 
 ExecutionContext* Screen::executionContext() const
 {
     if (!m_frame)
         return 0;
     return m_frame->document();
 }
 
+void Screen::trace(Visitor* visitor)
+{
+#if ENABLE(OILPAN)

[haraken, 2014/03/14 11:39:45]

Is this flag needed?

[zerny-chromium, 2014/03/14 11:54:48]

This is needed after a recent change because Supplementable no longer has a
trace method for the non GC case.

[sof, 2014/03/14 12:01:31]

Yes, we don't add a virtual trace() for the non-heap Supplementables.

+    HeapSupplementable<Screen>::trace(visitor);
+#endif
+}
+
 } // namespace WebCore