Oilpan: fix build after r200730.

Source/core/loader/DocumentLoader.cpp

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Google 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.
@@ skipping 111 matching lines @@
     ASSERT(!m_applicationCacheHost);
 }
 
 DEFINE_TRACE(DocumentLoader)
 {
     visitor->trace(m_frame);
     visitor->trace(m_fetcher);
     // TODO(sof): start tracing ResourcePtr<>s (and m_mainResource.)
     visitor->trace(m_writer);
     visitor->trace(m_archive);
+    visitor->trace(m_documentLoadTiming);
     visitor->trace(m_applicationCacheHost);
     visitor->trace(m_contentSecurityPolicy);
 }
 
 unsigned long DocumentLoader::mainResourceIdentifier() const
 {
     return m_mainResource ? m_mainResource->identifier() : 0;
 }
 
 Document* DocumentLoader::document() const
@@ skipping 731 matching lines @@
 {
     m_writer = createWriterFor(ownerDocument, init, mimeType(), m_writer ? m_writer->encoding() : emptyAtom, true, ForceSynchronousParsing);
     if (!source.isNull())
         m_writer->appendReplacingData(source);
     endWriting(m_writer.get());
 }
 
 DEFINE_WEAK_IDENTIFIER_MAP(DocumentLoader);
 
 } // namespace blink