Annotate ScriptWrappable-embedding singletons.

third_party/WebKit/Source/core/dom/custom/V0CustomElementScheduler.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * 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 33 matching lines @@
 #include "core/html/imports/HTMLImportChild.h"
 #include "core/html/imports/HTMLImportsController.h"
 
 namespace blink {
 
 // FIXME: Consider moving the element's callback queue to ElementRareData.
 typedef HeapHashMap<Member<Element>, Member<V0CustomElementCallbackQueue>>
     ElementCallbackQueueMap;
 
 static ElementCallbackQueueMap& callbackQueues() {
+  ALLOW_UNSAFE_SINGLETON()
   DEFINE_STATIC_LOCAL(ElementCallbackQueueMap, map,
                       (new ElementCallbackQueueMap));
   return map;
 }
 
 static V0CustomElementCallbackQueue& ensureCallbackQueue(Element* element) {
   ElementCallbackQueueMap::ValueType* it =
       callbackQueues().insert(element, nullptr).storedValue;
   if (!it->value)
     it->value = V0CustomElementCallbackQueue::create(element);
@@ skipping 96 matching lines @@
   if (V0CustomElementMicrotaskDispatcher::instance().elementQueueIsEmpty())
     callbackQueues().clear();
 }
 
 void V0CustomElementScheduler::microtaskDispatcherDidFinish() {
   DCHECK(!V0CustomElementProcessingStack::inCallbackDeliveryScope());
   callbackQueues().clear();
 }
 
 }  // namespace blink