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

Source/core/dom/shadow/ShadowRoot.cpp

 /*
  * Copyright (C) 2011 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 143 matching lines @@
     case PROCESSING_INSTRUCTION_NODE:
     case COMMENT_NODE:
     case TEXT_NODE:
     case CDATA_SECTION_NODE:
         return true;
     default:
         return false;
     }
 }
 
+InsertionPoint* ShadowRoot::shadowInsertionPoint() const
+{
+    ASSERT(!owner()->needsDistributionRecalc());
+    if (isOldest())
+        return 0;
+    return olderShadowRoot()->shadowInsertionPointOfYoungerShadowRoot();
+}
+
 void ShadowRoot::recalcStyle(StyleRecalcChange change)
 {
     // ShadowRoot doesn't support custom callbacks.
     ASSERT(!hasCustomStyleCallbacks());
 
     StyleResolver& styleResolver = document().ensureStyleResolver();
     styleResolver.pushParentShadowRoot(*this);
 
     if (styleChangeType() >= SubtreeStyleChange)
         change = Force;
 
     // There's no style to update so just calling recalcStyle means we're updated.
     clearNeedsStyleRecalc();
 
     // FIXME: This doesn't handle :hover + div properly like Element::recalcStyle does.
     Text* lastTextNode = 0;
+    InsertionPoint* shadowInsertionPointInShadowTree = shadowInsertionPoint();
     for (Node* child = lastChild(); child; child = child->previousSibling()) {
         if (child->isTextNode()) {
             toText(child)->recalcTextStyle(change, lastTextNode);
             lastTextNode = toText(child);
         } else if (child->isElementNode()) {
             if (shouldRecalcStyle(change, child))
-                toElement(child)->recalcStyle(change, lastTextNode);
+                toElement(child)->recalcStyle(change, lastTextNode, shadowInsertionPointInShadowTree);
             if (child->renderer())
                 lastTextNode = 0;
         }
     }
 
     styleResolver.popParentShadowRoot(*this);
 
     clearChildNeedsStyleRecalc();
 }
 
@@ skipping 213 matching lines @@
 
 StyleSheetList* ShadowRoot::styleSheets()
 {
     if (!ensureShadowRootRareData()->styleSheets())
         m_shadowRootRareData->setStyleSheets(StyleSheetList::create(this));
 
     return m_shadowRootRareData->styleSheets();
 }
 
 }