Make CSSAnimationUpdate stack-allocated

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 1571 matching lines @@
 
 PassRefPtr<ComputedStyle> Element::styleForLayoutObject()
 {
     ASSERT(document().inStyleRecalc());
 
     RefPtr<ComputedStyle> style;
 
     // FIXME: Instead of clearing updates that may have been added from calls to styleForElement
     // outside recalcStyle, we should just never set them if we're not inside recalcStyle.
     if (ElementAnimations* elementAnimations = this->elementAnimations())
-        elementAnimations->cssAnimations().setPendingUpdate(nullptr);
+        elementAnimations->cssAnimations().clearPendingUpdate();
 
     if (hasCustomStyleCallbacks())
         style = customStyleForLayoutObject();
     if (!style)
         style = originalStyleForLayoutObject();
     ASSERT(style);
 
     // styleForElement() might add active animations so we need to get it again.
     if (ElementAnimations* elementAnimations = this->elementAnimations()) {
         elementAnimations->cssAnimations().maybeApplyPendingUpdate(this);
@@ skipping 1895 matching lines @@
 {
 #if ENABLE(OILPAN)
     if (hasRareData())
         visitor->trace(elementRareData());
     visitor->trace(m_elementData);
 #endif
     ContainerNode::trace(visitor);
 }
 
 } // namespace blink