Revert of Convert remaining RenderSVG* nodes to RenderObject::isChildAllowed

Source/core/svg/SVGSwitchElement.cpp

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@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 30 matching lines @@
     registerAnimatedPropertiesForSVGSwitchElement();
 
     UseCounter::count(document, UseCounter::SVGSwitchElement);
 }
 
 PassRefPtr<SVGSwitchElement> SVGSwitchElement::create(Document& document)
 {
     return adoptRef(new SVGSwitchElement(document));
 }
 
+bool SVGSwitchElement::childShouldCreateRenderer(const Node& child) const
+{
+    // FIXME: This function does not do what the comment below implies it does.
+    // It will create a renderer for any valid SVG element children, not just the first one.
+    bool shouldCreateRenderer = false;
+    for (Node* node = firstChild(); node; node = node->nextSibling()) {
+        if (!node->isSVGElement())
+            continue;
+
+        SVGElement* element = toSVGElement(node);
+        if (!element || !element->isValid())
+            continue;
+
+        shouldCreateRenderer = node == &child; // Only allow this child if it's the first valid child.
+        break;
+    }
+
+    return shouldCreateRenderer && SVGGraphicsElement::childShouldCreateRenderer(child);
+}
+
 RenderObject* SVGSwitchElement::createRenderer(RenderStyle*)
 {
     return new RenderSVGTransformableContainer(this);
 }
 
 }