Handle layer clients in LayoutSVGResourceContainer::registerResource

Source/core/layout/svg/SVGResourcesCache.cpp

 /*
  * Copyright (C) Research In Motion Limited 2010. 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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 98 matching lines @@
 static inline bool layoutObjectCanHaveResources(LayoutObject* layoutObject)
 {
     ASSERT(layoutObject);
     return layoutObject->node() && layoutObject->node()->isSVGElement() && !layoutObject->isSVGInlineText();
 }
 
 void SVGResourcesCache::clientStyleChanged(LayoutObject* layoutObject, StyleDifference diff, const ComputedStyle& newStyle)
 {
     ASSERT(layoutObject);
     ASSERT(layoutObject->node());
-    ASSERT(layoutObject->node()->isSVGElement());
 
     if (!diff.hasDifference() || !layoutObject->parent())
         return;
 
     // In this case the proper SVGFE*Element will decide whether the modified CSS properties require a relayout or paintInvalidation.
     if (layoutObject->isSVGResourceFilterPrimitive() && !diff.needsLayout())
         return;
 
+    // If it's not an SVGElement, we can leave early because none of the below will have any effect.
+    if (!layoutObject->node()->isSVGElement())
+        return;
+
     // Dynamic changes of CSS properties like 'clip-path' may require us to recompute the associated resources for a layoutObject.
     // FIXME: Avoid passing in a useless StyleDifference, but instead compare oldStyle/newStyle to see which resources changed
     // to be able to selectively rebuild individual resources, instead of all of them.
     if (layoutObjectCanHaveResources(layoutObject)) {
         SVGResourcesCache* cache = resourcesCacheFromLayoutObject(layoutObject);
         cache->removeResourcesFromLayoutObject(layoutObject);
         cache->addResourcesFromLayoutObject(layoutObject, newStyle);
     }
 
     LayoutSVGResourceContainer::markForLayoutAndParentResourceInvalidation(layoutObject, false);
@@ skipping 49 matching lines @@
         // Mark users of destroyed resources as pending resolution based on the id of the old resource.
         Element* resourceElement = resource->element();
         Element* clientElement = toElement(objectResources.key->node());
         SVGDocumentExtensions& extensions = clientElement->document().accessSVGExtensions();
 
         extensions.addPendingResource(resourceElement->fastGetAttribute(HTMLNames::idAttr), clientElement);
     }
 }
 
 }