[SVG] Handle non-SVGAnimateElement results in calculateAnimatedValue()

Source/core/svg/animation/SMILTimeContainer.cpp

 /*
  * Copyright (C) 2008 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 268 matching lines @@
 
         SVGSMILElement* resultElement = 0;
         unsigned size = scheduled->size();
         for (unsigned n = 0; n < size; n++) {
             SVGSMILElement* animation = scheduled->at(n);
             ASSERT(animation->timeContainer() == this);
             ASSERT(animation->targetElement());
             ASSERT(animation->hasValidAttributeName());
 
             // Results are accumulated to the first animation that animates and contributes to a particular element/attribute pair.
+            // FIXME: we should ensure that resultElement is of an appropriate type.
             if (!resultElement) {
                 if (!animation->hasValidAttributeType())
                     continue;
                 resultElement = animation;
             }
 
             // This will calculate the contribution from the animation and add it to the resultsElement.
             if (!animation->progress(elapsed, resultElement, seekToTime) && resultElement == animation)
                 resultElement = 0;
 
@@ skipping 36 matching lines @@
 
             if (animDiscard->inDocument()) {
                 animDiscard->remove(IGNORE_EXCEPTION);
                 ASSERT(!animDiscard->inDocument());
             }
         }
     }
 }
 
 }