Don't emptify event.path after dispatching an event.

Source/core/events/Event.cpp

Index: Source/core/events/Event.cpp
diff --git a/Source/core/events/Event.cpp b/Source/core/events/Event.cpp
index 51596c1fed3a19100645a67f464624f0b15b9522..664c3be8bf76960adde892cc84117c01ed4cdb7a 100644
--- a/Source/core/events/Event.cpp
+++ b/Source/core/events/Event.cpp
@@ -224,7 +224,17 @@ EventPath& Event::ensureEventPath()
 
 PassRefPtrWillBeRawPtr<StaticNodeList> Event::path() const
 {
-    if (!m_currentTarget || !m_currentTarget->toNode())
+    if (!m_currentTarget) {
+        ASSERT(m_eventPhase == PhaseType::NONE);
+        if (!m_eventPath) {
+            // Before dispatching the event
+            return StaticNodeList::createEmpty();
+        }
+        ASSERT(!m_eventPath->isEmpty());
+        // After dispatching the event
+        return m_eventPath->last().treeScopeEventContext().ensureEventPath(*m_eventPath);
+    }
+    if (!m_currentTarget->toNode())
         return StaticNodeList::createEmpty();
     Node* node = m_currentTarget->toNode();
     // FIXME: Support SVG Elements.