Refactor ElementShadow by separating v0 related features as ElementShadowV0

third_party/WebKit/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 162 matching lines @@
 {
     const ElementShadow* elementShadow = element().shadow();
     const ElementShadow* candidateShadow = candidate.shadow();
 
     if (!elementShadow && !candidateShadow)
         return true;
 
     if (static_cast<bool>(elementShadow) != static_cast<bool>(candidateShadow))
         return false;
 
-    return elementShadow->hasSameStyles(candidateShadow);
+    return elementShadow->hasSameStyles(*candidateShadow);
 }
 
 bool SharedStyleFinder::sharingCandidateDistributedToSameInsertionPoint(Element& candidate) const
 {
     HeapVector<Member<InsertionPoint>, 8> insertionPoints, candidateInsertionPoints;
     collectDestinationInsertionPoints(element(), insertionPoints);
     collectDestinationInsertionPoints(candidate, candidateInsertionPoints);
     if (insertionPoints.size() != candidateInsertionPoints.size())
         return false;
     for (size_t i = 0; i < insertionPoints.size(); ++i) {
@@ skipping 156 matching lines @@
     // Tracking child index requires unique style for each node. This may get set by the sibling rule match above.
     if (!element().parentElementOrShadowRoot()->childrenSupportStyleSharing()) {
         INCREMENT_STYLE_STATS_COUNTER(document().styleEngine(), sharedStyleRejectedByParent, 1);
         return nullptr;
     }
 
     return shareElement->mutableComputedStyle();
 }
 
 } // namespace blink