Make Event.path() return a pre-calculated NodeList rather than calculating it dynamically.

Source/core/dom/Event.cpp

Index: Source/core/dom/Event.cpp
diff --git a/Source/core/dom/Event.cpp b/Source/core/dom/Event.cpp
index de51a3f403605a7fa7e5735ad608fbdbe0b818d7..4fc43306807fcafab1fa116c1091e23ebd69a45a 100644
--- a/Source/core/dom/Event.cpp
+++ b/Source/core/dom/Event.cpp
@@ -206,16 +206,15 @@ PassRefPtr<NodeList> Event::path() const
 {
     if (!m_currentTarget || !m_currentTarget->toNode())
         return StaticNodeList::createEmpty();
-    TreeScope* currentScope = m_currentTarget->toNode()->treeScope();
-    Vector<RefPtr<Node> > nodes;
+    Node* node = m_currentTarget->toNode();
     size_t eventPathSize = m_eventPath.size();
     for (size_t i = 0; i < eventPathSize; ++i) {
-        Node* node = m_eventPath[i]->node();
-        ASSERT(node);
-        if (node->treeScope()->isInclusiveAncestorOf(currentScope))
-            nodes.append(node);
+        if (node == m_eventPath[i]->node()) {
+            ASSERT(m_eventPath[i]->eventPath());
+            return m_eventPath[i]->eventPath();
+        }
     }
-    return StaticNodeList::adopt(nodes);
+    return StaticNodeList::createEmpty();
 }
 
 } // namespace WebCore