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

Source/core/dom/shadow/ContentDistributor.h

Index: Source/core/dom/shadow/ContentDistributor.h
diff --git a/Source/core/dom/shadow/ContentDistributor.h b/Source/core/dom/shadow/ContentDistributor.h
index 91a480c3cdf1f34b730238fe813a5d5d3b6ca153..107fab1330030f8fb10c4a6521d4773239e87673 100644
--- a/Source/core/dom/shadow/ContentDistributor.h
+++ b/Source/core/dom/shadow/ContentDistributor.h
@@ -134,10 +134,10 @@ public:
     void willAffectSelector(Element* host);
 
     static void ensureDistribution(ShadowRoot*);
-
+    static void ensureDistribution(ElementShadow*);
 private:
     void distribute(Element* host);
-    bool invalidate(Element* host);
+    bool invalidate(Element* host, Vector<RefPtr<Node> >& nodesNeedingReattach);
     void populate(Node*, ContentDistribution&);
 
     void collectSelectFeatureSetFrom(ShadowRoot*);
@@ -149,6 +149,8 @@ private:
     bool needsDistribution() const;
     bool needsInvalidation() const { return m_validity != Invalidated; }
 
+    static void ensureDistribution(Element* host);
+
     HashMap<const Node*, RefPtr<InsertionPoint> > m_nodeToInsertionPoint;
     SelectRuleFeatureSet m_selectFeatures;
     unsigned m_needsSelectFeatureSet : 1;