Web Animations: Introduce ActiveAnimations and AnimationStack

Source/core/css/resolver/SharedStyleFinder.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 13 matching lines @@
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "core/css/resolver/SharedStyleFinder.h"
 
 #include "HTMLNames.h"
 #include "XMLNames.h"
-#include "core/css/RuleFeature.h"
 #include "core/css/resolver/StyleResolver.h"
 #include "core/css/resolver/StyleResolverState.h"
 #include "core/dom/ContainerNode.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
 #include "core/dom/FullscreenController.h"
 #include "core/dom/Node.h"
 #include "core/dom/NodeRenderStyle.h"
 #include "core/dom/NodeTraversal.h"
 #include "core/dom/QualifiedName.h"
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     if (m_styleResolver->styleSharingCandidateMatchesRuleSet(context, newStyle, m_uncommonAttributeRuleSet))
         return 0;
     // Tracking child index requires unique style for each node. This may get set by the sibling rule match above.
     if (parentElementPreventsSharing(context.element()->parentElement()))
         return 0;
     STYLE_STATS_ADD_STYLE_SHARED();
     return shareElement->renderStyle();
 }
 
 }