Update styleRecalc so that it traverses shadow insertion points in 2 pass algorithms

Source/core/dom/shadow/ElementShadow.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 49 matching lines @@
     void detach(const Node::AttachContext&);
 
     void removeAllEventListeners();
 
     void didAffectSelector(AffectedSelectorMask);
     void willAffectSelector();
     const SelectRuleFeatureSet& ensureSelectFeatureSet();
 
     void distributeIfNeeded();
     void setNeedsDistributionRecalc();
+    bool needsDistributionRecalc() const { return m_needsDistributionRecalc; }
 
     const InsertionPoint* finalDestinationInsertionPointFor(const Node*) const;
     const DestinationInsertionPoints* destinationInsertionPointsFor(const Node*) const;
 
     void didDistributeNode(const Node*, InsertionPoint*);
 
 private:
     ElementShadow();
 
     void removeAllShadowRoots();
@@ skipping 31 matching lines @@
     return toElement(this)->youngestShadowRoot();
 }
 
 inline ShadowRoot* Element::youngestShadowRoot() const
 {
     if (ElementShadow* shadow = this->shadow())
         return shadow->youngestShadowRoot();
     return 0;
 }
 
+inline ShadowRoot* Element::oldestShadowRoot() const
+{
+    if (ElementShadow* shadow = this->shadow())
+        return shadow->oldestShadowRoot();
+    return 0;
+}
+
 inline ElementShadow* ElementShadow::containingShadow() const
 {
     if (ShadowRoot* parentRoot = host()->containingShadowRoot())
         return parentRoot->owner();
     return 0;
 }
 
 inline void ElementShadow::distributeIfNeeded()
 {
     if (m_needsDistributionRecalc)
         distribute();
     m_needsDistributionRecalc = false;
 }
 
 } // namespace
 
 #endif