Fix for calculation of event.path for closed mode shadow root

Source/core/events/EventPath.cpp

Index: Source/core/events/EventPath.cpp
diff --git a/Source/core/events/EventPath.cpp b/Source/core/events/EventPath.cpp
index bfdee9e9f1a18e49ec985885eb6e375d6fec6501..996b520162fac270a75855add8ed09e18d5b0026 100644
--- a/Source/core/events/EventPath.cpp
+++ b/Source/core/events/EventPath.cpp
@@ -166,7 +166,8 @@ void EventPath::calculateTreeScopePrePostOrderNumbers()
     TreeScopeEventContext* rootTree = 0;
     for (const auto& treeScopeEventContext : m_treeScopeEventContexts) {
         // Use olderShadowRootOrParentTreeScope here for parent-child relationships.
-        // See the definition of trees of trees in the Shado DOM spec: http://w3c.github.io/webcomponents/spec/shadow/
+        // See the definition of trees of trees in the Shadow DOM spec:
+        // http://w3c.github.io/webcomponents/spec/shadow/
         TreeScope* parent = treeScopeEventContext.get()->treeScope().olderShadowRootOrParentTreeScope();
         if (!parent) {
             ASSERT(!rootTree);
@@ -177,7 +178,7 @@ void EventPath::calculateTreeScopePrePostOrderNumbers()
         treeScopeEventContextMap.find(parent)->value->addChild(*treeScopeEventContext.get());
     }
     ASSERT(rootTree);
-    rootTree->calculatePrePostOrderNumber(0);
+    rootTree->calculateTreeOrderAndFindClosedTrees(0, nullptr);
 }
 
 TreeScopeEventContext* EventPath::ensureTreeScopeEventContext(Node* currentTarget, TreeScope* treeScope, TreeScopeEventContextMap& treeScopeEventContextMap)