[oilpan] Make the oilpan branch build on Mac.

Source/core/html/ImageDocument.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 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 152 matching lines @@
         document()->imageUpdated();
     }
 
     document()->finishedParsing();
 }
     
 // --------
 
 ImageDocument::ImageDocument(Frame* frame, const KURL& url)
     : HTMLDocument(frame, url)
-    , m_imageElement(0)
     , m_imageSizeIsKnown(false)
     , m_didShrinkImage(false)
     , m_shouldShrinkImage(shouldShrinkToFit())
 {
     setCompatibilityMode(QuirksMode);
     lockCompatibilityMode();
 }
     
 PassRefPtr<DocumentParser> ImageDocument::createParser()
 {
@@ skipping 227 matching lines @@
     HTMLImageElement::didMoveToNewDocument(oldDocument);
 }
 
 void ImageDocumentElement::accept(Visitor* visitor) const
 {
     visitor->visit(m_imageDocument);
     HTMLImageElement::accept(visitor);
 }
 
 }