[test] lazily parse css style rules

third_party/WebKit/Source/core/css/StyleSheetContents.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 141 matching lines @@
     bool hasMediaQueries() const { return m_hasMediaQueries; }
 
     bool didLoadErrorOccur() const { return m_didLoadErrorOccur; }
 
     RuleSet& ruleSet() { ASSERT(m_ruleSet); return *m_ruleSet.get(); }
     RuleSet& ensureRuleSet(const MediaQueryEvaluator&, AddRuleFlags);
     void clearRuleSet();
 
     String sourceMapURL() const { return m_sourceMapURL; }
 
+    void populateStringPool(const Vector<String> strings)
+    {
+        for (const auto& s : strings) {
+            m_stringPool.append(s);
+        }
+    }
+
     DECLARE_TRACE();
 
 private:
     StyleSheetContents(StyleRuleImport* ownerRule, const String& originalURL, const CSSParserContext&);
     StyleSheetContents(const StyleSheetContents&);
     StyleSheetContents() = delete;
     StyleSheetContents& operator=(const StyleSheetContents&) = delete;
     void notifyRemoveFontFaceRule(const StyleRuleFontFace*);
 
     Document* clientSingleOwnerDocument() const;
@@ skipping 18 matching lines @@
     bool m_hasSingleOwnerDocument : 1;
     bool m_isUsedFromTextCache : 1;
 
     CSSParserContext m_parserContext;
 
     HeapHashSet<WeakMember<CSSStyleSheet>> m_loadingClients;
     HeapHashSet<WeakMember<CSSStyleSheet>> m_completedClients;
 
     Member<RuleSet> m_ruleSet;
     String m_sourceMapURL;
+    Vector<String> m_stringPool;
 };
 
 } // namespace blink
 
 #endif