Flag to disable SMIL support

Source/core/svg/SVGDiscardElement.cpp

 /*
  * Copyright (C) 2014 Samsung Electronics. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 20 matching lines @@
 #include "config.h"
 #include "core/svg/SVGDiscardElement.h"
 
 #include "core/SVGNames.h"
 
 namespace blink {
 
 inline SVGDiscardElement::SVGDiscardElement(Document& document)
     : SVGSMILElement(SVGNames::discardTag, document)
 {
+    ASSERT(RuntimeEnabledFeatures::smilEnabled());
 }
 
 DEFINE_NODE_FACTORY(SVGDiscardElement)
 
 bool SVGDiscardElement::hasValidAttributeType()
 {
     // Even if there is no targetElement, discard is still a valid animation as it has to delete itself.
     return true;
 }
 
 bool SVGDiscardElement::hasValidAttributeName()
 {
     // discard does not use attributeName so it is always valid.
     return true;
 }
 
 }