Annotate ScriptWrappable-embedding singletons.

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

 /*
  * Copyright (C) 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 159 matching lines @@
     FrameLoaderClient::SuddenTerminationDisablerType disablerType) {
   Platform::current()->suddenTerminationChanged(!addedListener);
   if (domWindow->frame() && domWindow->frame()->loader().client())
     domWindow->frame()->loader().client()->suddenTerminationDisablerChanged(
         addedListener, disablerType);
 }
 
 using DOMWindowSet = PersistentHeapHashCountedSet<WeakMember<LocalDOMWindow>>;
 
 static DOMWindowSet& windowsWithUnloadEventListeners() {
+  ALLOW_UNSAFE_SINGLETON()
   DEFINE_STATIC_LOCAL(DOMWindowSet, windowsWithUnloadEventListeners, ());
   return windowsWithUnloadEventListeners;
 }
 
 static DOMWindowSet& windowsWithBeforeUnloadEventListeners() {
+  ALLOW_UNSAFE_SINGLETON()
   DEFINE_STATIC_LOCAL(DOMWindowSet, windowsWithBeforeUnloadEventListeners, ());
   return windowsWithBeforeUnloadEventListeners;
 }
 
 static void addUnloadEventListener(LocalDOMWindow* domWindow) {
   DOMWindowSet& set = windowsWithUnloadEventListeners();
   if (set.isEmpty())
     updateSuddenTerminationStatus(domWindow, true,
                                   FrameLoaderClient::UnloadHandler);
 
@@ skipping 1437 matching lines @@
   DOMWindow::trace(visitor);
   Supplementable<LocalDOMWindow>::trace(visitor);
 }
 
 DEFINE_TRACE_WRAPPERS(LocalDOMWindow) {
   visitor->traceWrappers(m_customElements);
   DOMWindow::traceWrappers(visitor);
 }
 
 }  // namespace blink