Annotate ScriptWrappable-embedding singletons.

third_party/WebKit/Source/core/xml/XPathValue.cpp

 /*
  * Copyright 2005 Frerich Raabe <raabe@kde.org>
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * 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.
@@ skipping 32 matching lines @@
 
 DEFINE_TRACE(Value) {
   visitor->trace(m_data);
 }
 
 const NodeSet& Value::toNodeSet(EvaluationContext* context) const {
   if (!isNodeSet() && context)
     context->hadTypeConversionError = true;
 
   if (!m_data) {
+    ALLOW_UNSAFE_SINGLETON()
     DEFINE_STATIC_LOCAL(NodeSet, emptyNodeSet, (NodeSet::create()));
     return emptyNodeSet;
   }
 
   return m_data->nodeSet();
 }
 
 NodeSet& Value::modifiableNodeSet(EvaluationContext& context) {
   if (!isNodeSet())
     context.hadTypeConversionError = true;
@@ skipping 69 matching lines @@
       return String::number(m_number);
     case BooleanValue:
       return m_bool ? "true" : "false";
   }
   NOTREACHED();
   return String();
 }
 
 }  // namespace XPath
 }  // namespace blink