Make event.composedPath() on window behave the same way as that on document

third_party/WebKit/Source/core/events/Event.cpp

Index: third_party/WebKit/Source/core/events/Event.cpp
diff --git a/third_party/WebKit/Source/core/events/Event.cpp b/third_party/WebKit/Source/core/events/Event.cpp
index c064d720b68cff946929e817ea6c295611267688..d2ebd7fef9aa6ceb974f99a36bb4382d4a82b69d 100644
--- a/third_party/WebKit/Source/core/events/Event.cpp
+++ b/third_party/WebKit/Source/core/events/Event.cpp
@@ -327,10 +327,14 @@ HeapVector<Member<EventTarget>> Event::pathInternal(ScriptState* scriptState,
     NOTREACHED();
   }
 
-  // Returns [window] for events that are directly dispatched to the window object;
-  // e.g., window.load, pageshow, etc.
-  if (LocalDOMWindow* window = m_currentTarget->toLocalDOMWindow())
+  if (LocalDOMWindow* window = m_currentTarget->toLocalDOMWindow()) {
+    if (m_eventPath && !m_eventPath->isEmpty()) {
+      return m_eventPath->topNodeEventContext()
+          .treeScopeEventContext()
+          .ensureEventPath(*m_eventPath);
+    }
     return HeapVector<Member<EventTarget>>(1, window);
+  }
 
   return HeapVector<Member<EventTarget>>();
 }