Convert SVG <foreignObject> to use RenderObject::isChildAllowed

Source/core/svg/SVGForeignObjectElement.cpp

 /*
  * Copyright (C) 2006 Apple Inc. All rights reserved.
  * Copyright (C) 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 100 matching lines @@
 
     if (RenderObject* renderer = this->renderer())
         RenderSVGResource::markForLayoutAndParentResourceInvalidation(renderer);
 }
 
 RenderObject* SVGForeignObjectElement::createRenderer(RenderStyle*)
 {
     return new RenderSVGForeignObject(this);
 }
 
-bool SVGForeignObjectElement::childShouldCreateRenderer(const Node& child) const
-{
-    // Disallow arbitary SVG content. Only allow proper <svg xmlns="svgNS"> subdocuments.
-    if (child.isSVGElement())
-        return child.hasTagName(SVGNames::svgTag);
-    // Skip over SVG rules which disallow non-SVG kids
-    return true;
-}
-
 bool SVGForeignObjectElement::rendererIsNeeded(const RenderStyle& style)
 {
     // Suppress foreignObject renderers in SVG hidden containers.
     // (https://bugs.webkit.org/show_bug.cgi?id=87297)
     // Note that we currently do not support foreignObject instantiation via <use>, hence it is safe
     // to use parentElement() here. If that changes, this method should be updated to use
     // parentOrShadowHostElement() instead.
     Element* ancestor = parentElement();
     while (ancestor && ancestor->isSVGElement()) {
         if (ancestor->renderer() && ancestor->renderer()->isSVGHiddenContainer())
             return false;
 
         ancestor = ancestor->parentElement();
     }
 
     return SVGGraphicsElement::rendererIsNeeded(style);
 }
 
 bool SVGForeignObjectElement::selfHasRelativeLengths() const
 {
     return m_x->currentValue()->isRelative()
         || m_y->currentValue()->isRelative()
         || m_width->currentValue()->isRelative()
         || m_height->currentValue()->isRelative();
 }
 
 }