Clear need for animation style for forced styleForElement.

Source/core/dom/Element.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2007 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012, 2013 Apple Inc. All rights reserved.
  *           (C) 2007 Eric Seidel (eric@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 1713 matching lines @@
         styleResolver->ensureUpdatedRuleFeatureSet().scheduleStyleInvalidationForPseudoChange(pseudo, *this);
 
     if (ElementShadow* elementShadow = shadowWhereNodeCanBeDistributed(*this))
         elementShadow->distributedNodePseudoStateChanged(pseudo);
 }
 
 void Element::setAnimationStyleChange(bool animationStyleChange)
 {
     if (animationStyleChange && document().inStyleRecalc())
         return;
+    if (!hasRareData())
+        return;
     if (ElementAnimations* elementAnimations = elementRareData()->elementAnimations())
         elementAnimations->setAnimationStyleChange(animationStyleChange);
 }
 
+void Element::clearAnimationStyleChange()
+{
+    if (!hasRareData())
+        return;
+    if (ElementAnimations* elementAnimations = elementRareData()->elementAnimations())
+        elementAnimations->setAnimationStyleChange(false);
+}
+
 void Element::setNeedsAnimationStyleRecalc()
 {
     if (styleChangeType() != NoStyleChange)
         return;
 
     setNeedsStyleRecalc(LocalStyleChange, StyleChangeReasonForTracing::create(StyleChangeReason::Animation));
     setAnimationStyleChange(true);
 }
 
 void Element::setNeedsCompositingUpdate()
@@ skipping 1624 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink