Have SVGURIReference API deal with Document references, not pointers

Source/core/svg/graphics/filters/SVGFEImage.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2010 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 29 matching lines @@
 namespace WebCore {
 
 FEImage::FEImage(Filter* filter, PassRefPtr<Image> image, const SVGPreserveAspectRatio& preserveAspectRatio)
     : FilterEffect(filter)
     , m_image(image)
     , m_document(0)
     , m_preserveAspectRatio(preserveAspectRatio)
 {
 }
 
-FEImage::FEImage(Filter* filter, Document* document, const String& href, const SVGPreserveAspectRatio& preserveAspectRatio)
+FEImage::FEImage(Filter* filter, Document& document, const String& href, const SVGPreserveAspectRatio& preserveAspectRatio)
     : FilterEffect(filter)
-    , m_document(document)
+    , m_document(&document)
     , m_href(href)
     , m_preserveAspectRatio(preserveAspectRatio)
 {
 }
 
 PassRefPtr<FEImage> FEImage::createWithImage(Filter* filter, PassRefPtr<Image> image, const SVGPreserveAspectRatio& preserveAspectRatio)
 {
     return adoptRef(new FEImage(filter, image, preserveAspectRatio));
 }
 
-PassRefPtr<FEImage> FEImage::createWithIRIReference(Filter* filter, Document* document, const String& href, const SVGPreserveAspectRatio& preserveAspectRatio)
+PassRefPtr<FEImage> FEImage::createWithIRIReference(Filter* filter, Document& document, const String& href, const SVGPreserveAspectRatio& preserveAspectRatio)
 {
     return adoptRef(new FEImage(filter, document, href, preserveAspectRatio));
 }
 
 void FEImage::determineAbsolutePaintRect()
 {
     FloatRect paintRect = filter()->absoluteTransform().mapRect(filterPrimitiveSubregion());
     FloatRect srcRect;
     if (m_image) {
         srcRect.setSize(m_image->size());
         m_preserveAspectRatio.transformRect(paintRect, srcRect);
     } else if (RenderObject* renderer = referencedRenderer())
         srcRect = filter()->absoluteTransform().mapRect(renderer->repaintRectInLocalCoordinates());
 
     if (clipsToBounds())
         paintRect.intersect(maxEffectRect());
     else
         paintRect.unite(maxEffectRect());
     setAbsolutePaintRect(enclosingIntRect(paintRect));
 }
 
 RenderObject* FEImage::referencedRenderer() const
 {
     if (!m_document)
         return 0;
-    Element* hrefElement = SVGURIReference::targetElementFromIRIString(m_href, m_document);
+    Element* hrefElement = SVGURIReference::targetElementFromIRIString(m_href, *m_document);
     if (!hrefElement || !hrefElement->isSVGElement())
         return 0;
     return hrefElement->renderer();
 }
 
 void FEImage::applySoftware()
 {
     RenderObject* renderer = referencedRenderer();
     if (!m_image && !renderer)
         return;
@@ skipping 62 matching lines @@
     if (!m_image)
         return 0;
 
     if (!m_image->nativeImageForCurrentFrame())
         return 0;
 
     return adoptRef(new SkBitmapSource(m_image->nativeImageForCurrentFrame()->bitmap()));
 }
 
 } // namespace WebCore