Oilpan: move Touch related objects to the oilpan heap.

Source/core/dom/TouchList.cpp

 /*
  * Copyright 2008, The Android Open Source Project
  *
  * 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 copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 23 matching lines @@
     if (index >= m_values.size())
         return 0;
     return m_values[index].get();
 }
 
 const Touch* TouchList::item(unsigned index) const
 {
     return const_cast<TouchList*>(this)->item(index);
 }
 
+void TouchList::trace(Visitor* visitor)
+{
+    visitor->trace(m_values);
+}
+
 } // namespace WebCore