Clear need for animation style for forced styleForElement.

Source/core/dom/Element.h

 /*
  * 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)
  * Copyright (C) 2003-2011, 2013, 2014 Apple Inc. All rights reserved.
  *
  * 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
@@ skipping 295 matching lines @@
 
     virtual void copyNonAttributePropertiesFromElement(const Element&) { }
 
     virtual void attach(const AttachContext& = AttachContext()) override;
     virtual void detach(const AttachContext& = AttachContext()) override;
 
     virtual LayoutObject* createLayoutObject(const LayoutStyle&);
     virtual bool layoutObjectIsNeeded(const LayoutStyle&);
     void recalcStyle(StyleRecalcChange, Text* nextTextSibling = nullptr);
     void pseudoStateChanged(CSSSelector::PseudoType);
-    void setAnimationStyleChange(bool);
+    void setAnimationStyleChange(bool) const;

[esprehn, 2015/03/19 10:40:58]

Setters should not be const.

+    void clearAnimationStyleChange() const;
     void setNeedsAnimationStyleRecalc();
 
     void setNeedsCompositingUpdate();
 
     bool supportsStyleSharing() const;
 
     ElementShadow* shadow() const;
     ElementShadow& ensureShadow();
     PassRefPtrWillBeRawPtr<ShadowRoot> createShadowRoot(ExceptionState&);
     ShadowRoot* shadowRoot() const;
@@ skipping 552 matching lines @@
     static PassRefPtrWillBeRawPtr<T> create(const QualifiedName&, Document&)
 #define DEFINE_ELEMENT_FACTORY_WITH_TAGNAME(T) \
     PassRefPtrWillBeRawPtr<T> T::create(const QualifiedName& tagName, Document& document) \
     { \
         return adoptRefWillBeNoop(new T(tagName, document)); \
     }
 
 } // namespace
 
 #endif // Element_h