Oilpan: move mutation observers to the Oilpan heap.

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 2841 matching lines @@
     }
 
     if (oldValue != newValue) {
         if (inActiveDocument())
             document().ensureStyleResolver().ensureUpdatedRuleFeatureSet().scheduleStyleInvalidationForAttributeChange(name, *this);
 
         if (isUpgradedCustomElement())
             CustomElement::attributeDidChange(this, name.localName(), oldValue, newValue);
     }
 
-    if (OwnPtr<MutationObserverInterestGroup> recipients = MutationObserverInterestGroup::createForAttributesMutation(*this, name))
+    if (OwnPtrWillBeRawPtr<MutationObserverInterestGroup> recipients = MutationObserverInterestGroup::createForAttributesMutation(*this, name))
         recipients->enqueueMutationRecord(MutationRecord::createAttributes(this, name, oldValue));
 
     InspectorInstrumentation::willModifyDOMAttr(this, oldValue, newValue);
 }
 
 void Element::didAddAttribute(const QualifiedName& name, const AtomicString& value)
 {
     attributeChanged(name, value);
     InspectorInstrumentation::didModifyDOMAttr(this, name.localName(), value);
     dispatchSubtreeModifiedEvent();
@@ skipping 470 matching lines @@
         || isHTMLObjectElement(*this)
         || isHTMLAppletElement(*this)
         || isHTMLCanvasElement(*this))
         return false;
     if (FullscreenElementStack::isActiveFullScreenElement(this))
         return false;
     return true;
 }
 
 } // namespace WebCore