Hold SVGFontFaceElement in SVGDocumentExtensions until StyleRecalc is finished

Source/core/svg/SVGDocumentExtensions.h

 /*
  * Copyright (C) 2006 Apple Inc. All rights reserved.
  * Copyright (C) 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 63 matching lines @@
 
     void addSVGRootWithRelativeLengthDescendents(SVGSVGElement*);
     void removeSVGRootWithRelativeLengthDescendents(SVGSVGElement*);
     bool isSVGRootWithRelativeLengthDescendents(SVGSVGElement*) const;
     void invalidateSVGRootsWithRelativeLengthDescendents(SubtreeLayoutScope*);
 
 #if ENABLE(SVG_FONTS)
     const HashSet<SVGFontFaceElement*>& svgFontFaceElements() const { return m_svgFontFaceElements; }
     void registerSVGFontFaceElement(SVGFontFaceElement*);
     void unregisterSVGFontFaceElement(SVGFontFaceElement*);
+
+    void registerPendingSVGFontFaceElementsForRemoval(PassRefPtr<SVGFontFaceElement>);
+    void removePendingSVGFontFaceElementsForRemoval();
 #endif
 
 private:
     Document* m_document; // weak reference
     HashSet<SVGSVGElement*> m_timeContainers; // For SVG 1.2 support this will need to be made more general.
 #if ENABLE(SVG_FONTS)
     HashSet<SVGFontFaceElement*> m_svgFontFaceElements;
+    // SVGFontFaceElements that are pending and scheduled for removal.
+    HashSet<RefPtr<SVGFontFaceElement> > m_pendingSVGFontFaceElementsForRemoval;
 #endif
     HashMap<AtomicString, RenderSVGResourceContainer*> m_resources;
     HashMap<AtomicString, OwnPtr<SVGPendingElements> > m_pendingResources; // Resources that are pending.
     HashMap<AtomicString, OwnPtr<SVGPendingElements> > m_pendingResourcesForRemoval; // Resources that are pending and scheduled for removal.
     HashMap<SVGElement*, OwnPtr<HashSet<SVGElement*> > > m_elementDependencies;
     OwnPtr<SVGResourcesCache> m_resourcesCache;
     HashSet<SVGSVGElement*> m_relativeLengthSVGRoots; // Root SVG elements with relative length descendants.
 #if !ASSERT_DISABLED
     bool m_inRelativeLengthSVGRootsInvalidation;
 #endif
@@ skipping 16 matching lines @@
     void markPendingResourcesForRemoval(const AtomicString&);
     Element* removeElementFromPendingResourcesForRemoval(const AtomicString&);
 
 private:
     PassOwnPtr<SVGPendingElements> removePendingResourceForRemoval(const AtomicString&);
 };
 
 }
 
 #endif