Oilpan: move editing objects to the heap.

Source/core/editing/SplitTextNodeContainingElementCommand.cpp

 /*
  * Copyright (C) 2005, 2008 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 42 matching lines @@
 
     RenderObject* parentRenderer = parent->renderer();
     if (!parentRenderer || !parentRenderer->isInline()) {
         wrapContentsInDummySpan(parent);
         Node* firstChild = parent->firstChild();
         if (!firstChild || !firstChild->isElementNode())
             return;
         parent = toElement(firstChild);
     }
 
-    splitElement(parent, m_text);
+    splitElement(parent, m_text.get());
+}
+
+void SplitTextNodeContainingElementCommand::trace(Visitor* visitor)
+{
+    visitor->trace(m_text);
+    CompositeEditCommand::trace(visitor);
 }
 
 }