Element::recalcStyle() overly reattach()-es InsertionPoints.

Source/core/dom/shadow/InsertionPoint.cpp

 /*
  * 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.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 188 matching lines @@
     return selectorList;
 }
 
 InsertionPoint* resolveReprojection(const Node* projectedNode)
 {
     InsertionPoint* insertionPoint = 0;
     const Node* current = projectedNode;
 
     while (current) {
         if (ElementShadow* shadow = shadowOfParentForDistribution(current)) {
+            ContentDistributor::ensureDistribution(shadow);
             if (ShadowRoot* root = current->containingShadowRoot())
                 ContentDistributor::ensureDistribution(root);
             if (InsertionPoint* insertedTo = shadow->distributor().findInsertionPointFor(projectedNode)) {
                 current = insertedTo;
                 insertionPoint = insertedTo;
                 continue;
             }
         }
 
         if (Node* parent = parentNodeForDistribution(current)) {
@@ skipping 28 matching lines @@
                 current = insertedTo;
                 results.append(insertedTo);
                 continue;
             }
         }
         return;
     }
 }
 
 } // namespace WebCore