Flag to disable SMIL support

Source/core/svg/SVGDocumentExtensions.cpp

 /*
  * Copyright (C) 2006 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007 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.
  *
@@ skipping 66 matching lines @@
 LayoutSVGResourceContainer* SVGDocumentExtensions::resourceById(const AtomicString& id) const
 {
     if (id.isEmpty())
         return nullptr;
 
     return m_resources.get(id);
 }
 
 void SVGDocumentExtensions::serviceOnAnimationFrame(Document& document, double monotonicAnimationStartTime)
 {
-    if (!document.svgExtensions())
+    if (!document.svgExtensions() || !RuntimeEnabledFeatures::smilEnabled())
         return;
     document.accessSVGExtensions().serviceAnimations(monotonicAnimationStartTime);
 }
 
 void SVGDocumentExtensions::serviceAnimations(double monotonicAnimationStartTime)
 {
     WillBeHeapVector<RefPtrWillBeMember<SVGSVGElement>> timeContainers;
     copyToVector(m_timeContainers, timeContainers);
     for (const auto& container : timeContainers)
         container->timeContainer()->serviceAnimations(monotonicAnimationStartTime);
@@ skipping 259 matching lines @@
 #if ENABLE(OILPAN)
     visitor->trace(m_document);
     visitor->trace(m_timeContainers);
     visitor->trace(m_relativeLengthSVGRoots);
     visitor->trace(m_pendingResources);
     visitor->trace(m_pendingResourcesForRemoval);
 #endif
 }
 
 }