Annotate ScriptWrappable-embedding singletons.

third_party/WebKit/Source/core/dom/DocumentOrderedMap.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 Apple 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 139 matching lines @@
 Element* DocumentOrderedMap::getElementById(const AtomicString& key,
                                             const TreeScope* scope) const {
   return get<keyMatchesId>(key, scope);
 }
 
 const HeapVector<Member<Element>>& DocumentOrderedMap::getAllElementsById(
     const AtomicString& key,
     const TreeScope* scope) const {
   DCHECK(key);
   DCHECK(scope);
+  ALLOW_UNSAFE_SINGLETON()
   DEFINE_STATIC_LOCAL(HeapVector<Member<Element>>, emptyVector,
                       (new HeapVector<Member<Element>>));
 
   Map::iterator it = m_map.find(key);
   if (it == m_map.end())
     return emptyVector;
 
   Member<MapEntry>& entry = it->value;
   DCHECK(entry->count);
 
@@ skipping 35 matching lines @@
 DEFINE_TRACE(DocumentOrderedMap) {
   visitor->trace(m_map);
 }
 
 DEFINE_TRACE(DocumentOrderedMap::MapEntry) {
   visitor->trace(element);
   visitor->trace(orderedList);
 }
 
 }  // namespace blink