Oilpan: fix build after r187207.

Source/core/inspector/InspectorDOMAgent.cpp

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google Inc. All rights reserved.
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * 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
@@ skipping 212 matching lines @@
     // The timer is stopped on m_domAgent destruction, so this method will never be called after m_domAgent has been destroyed.
     WillBeHeapVector<RawPtrWillBeMember<Element> > elements;
     WillBePersistentHeapHashSet<RefPtrWillBeMember<Element> >::iterator it;
     for (it = m_styleAttrInvalidatedElements.begin(); it != m_styleAttrInvalidatedElements.end(); ++it)
         elements.append(it->get());
     m_domAgent->styleAttributeInvalidated(elements);
 
     m_styleAttrInvalidatedElements.clear();
 
     elements.clear();
-    for (const auto& it : m_contentDistributionInvalidatedElements)
+    for (const RefPtrWillBeMember<Element>& it : m_contentDistributionInvalidatedElements)
         elements.append(it.get());
     m_domAgent->contentDistributionInvalidated(elements);
 
     m_contentDistributionInvalidatedElements.clear();
 }
 
 void InspectorRevalidateDOMTask::trace(Visitor* visitor)
 {
     visitor->trace(m_domAgent);
 #if ENABLE(OILPAN)
@@ skipping 2060 matching lines @@
     visitor->trace(m_revalidateTask);
     visitor->trace(m_searchResults);
 #endif
     visitor->trace(m_history);
     visitor->trace(m_domEditor);
     visitor->trace(m_listener);
     InspectorBaseAgent::trace(visitor);
 }
 
 } // namespace blink
-