LocalDOMWindow::reset doesn't need to notify contextDestroyed()

third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp

Index: third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
diff --git a/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp b/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
index 1250ed12777b73ff166f44ffc5fe84f57b024122..736aae73a8f3a3c1a809e9315ff5e00dd9f8412c 100644
--- a/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
+++ b/third_party/WebKit/Source/core/frame/LocalDOMWindow.cpp
@@ -498,9 +498,7 @@ void LocalDOMWindow::registerEventListenerObserver(
 
 void LocalDOMWindow::reset() {
   DCHECK(document());
-  // Since |Document| class has multiple |LifecycleNotifier| as base class,
-  // we need to have |static_cast<ExecutionContext>| here.
-  static_cast<ExecutionContext*>(document())->notifyContextDestroyed();
+  DCHECK(document()->isContextDestroyed());
   frameDestroyed();
 
   m_screen = nullptr;