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 19 matching lines @@
 #include "core/css/resolver/SharedStyleFinder.h"
 
 // FIXME: This include list is way more than we need!
 #include "CSSPropertyNames.h"
 #include "HTMLNames.h"
 #include "RuntimeEnabledFeatures.h"
 #include "SVGNames.h"
 #include "XMLNames.h"
 #include "core/animation/AnimatableValue.h"
 #include "core/animation/Animation.h"
+#include "core/animation/DocumentTimeline.h"
 #include "core/css/CSSCalculationValue.h"
 #include "core/css/CSSCursorImageValue.h"
 #include "core/css/CSSDefaultStyleSheets.h"
 #include "core/css/CSSFontSelector.h"
 #include "core/css/CSSImageSetValue.h"
 #include "core/css/CSSKeyframeRule.h"
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/CSSLineBoxContainValue.h"
 #include "core/css/CSSParser.h"
 #include "core/css/CSSPrimitiveValueMappings.h"
@@ skipping 371 matching lines @@
     // Can't share if attribute rules apply.
     if (m_styleResolver->styleSharingCandidateMatchesRuleSet(context, 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;
     return shareElement->renderStyle();
 }
 
 }