Annotate ScriptWrappable-embedding singletons.

third_party/WebKit/Source/core/css/parser/CSSParserContext.cpp

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/css/parser/CSSParserContext.h"
 
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/StyleSheetContents.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/Settings.h"
@@ skipping 109 matching lines @@
 bool CSSParserContext::operator==(const CSSParserContext& other) const {
   return m_baseURL == other.m_baseURL && m_charset == other.m_charset &&
          m_mode == other.m_mode && m_matchMode == other.m_matchMode &&
          m_profile == other.m_profile &&
          m_isHTMLDocument == other.m_isHTMLDocument &&
          m_useLegacyBackgroundSizeShorthandBehavior ==
              other.m_useLegacyBackgroundSizeShorthandBehavior;
 }
 
 const CSSParserContext* strictCSSParserContext() {
+  ALLOW_UNSAFE_SINGLETON()
   DEFINE_STATIC_LOCAL(CSSParserContext, strictContext,
                       (CSSParserContext::create(HTMLStandardMode)));
   return &strictContext;
 }
 
 KURL CSSParserContext::completeURL(const String& url) const {
   if (url.isNull())
     return KURL();
   if (charset().isEmpty())
     return KURL(baseURL(), url);
@@ skipping 15 matching lines @@
 
 bool CSSParserContext::isDocumentHandleEqual(const Document* other) const {
   return m_document.get() == other;
 }
 
 DEFINE_TRACE(CSSParserContext) {
   visitor->trace(m_document);
 }
 
 }  // namespace blink