Introduce TerminatedArray<T> type to make data-structure used by RuleSet visible at the type level.

Source/core/css/RuleSet.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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 12 matching lines @@
 #define RuleSet_h
 
 #include "core/css/CSSKeyframesRule.h"
 #include "core/css/MediaQueryEvaluator.h"
 #include "core/css/RuleFeature.h"
 #include "core/css/StyleRule.h"
 #include "core/css/resolver/MediaQueryResult.h"
 #include "wtf/Forward.h"
 #include "wtf/HashMap.h"
 #include "wtf/LinkedStack.h"
+#include "wtf/TerminatedArray.h"
 
 namespace WebCore {
 
 enum AddRuleFlags {
     RuleHasNoSpecialState         = 0,
     RuleHasDocumentSecurityOrigin = 1,
     RuleCanUseFastCheckSelector   = 1 << 1,
 };
 
 enum PropertyWhitelistType {
@@ skipping 75 matching lines @@
     WTF_MAKE_NONCOPYABLE(RuleSet); WTF_MAKE_FAST_ALLOCATED;
 public:
     static PassOwnPtr<RuleSet> create() { return adoptPtr(new RuleSet); }
 
     void addRulesFromSheet(StyleSheetContents*, const MediaQueryEvaluator&, AddRuleFlags = RuleHasNoSpecialState);
     void addStyleRule(StyleRule*, AddRuleFlags);
     void addRule(StyleRule*, unsigned selectorIndex, AddRuleFlags);
 
     const RuleFeatureSet& features() const { return m_features; }
 
-    const RuleData* idRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_idRules.get(key); }
-    const RuleData* classRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_classRules.get(key); }
-    const RuleData* tagRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_tagRules.get(key); }
-    const RuleData* shadowPseudoElementRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_shadowPseudoElementRules.get(key); }
+    const TerminatedArray<RuleData>* idRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_idRules.get(key); }
+    const TerminatedArray<RuleData>* classRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_classRules.get(key); }
+    const TerminatedArray<RuleData>* tagRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_tagRules.get(key); }
+    const TerminatedArray<RuleData>* shadowPseudoElementRules(const AtomicString& key) const { ASSERT(!m_pendingRules); return m_shadowPseudoElementRules.get(key); }
     const Vector<RuleData>* linkPseudoClassRules() const { ASSERT(!m_pendingRules); return &m_linkPseudoClassRules; }
     const Vector<RuleData>* cuePseudoRules() const { ASSERT(!m_pendingRules); return &m_cuePseudoRules; }
     const Vector<RuleData>* focusPseudoClassRules() const { ASSERT(!m_pendingRules); return &m_focusPseudoClassRules; }
     const Vector<RuleData>* universalRules() const { ASSERT(!m_pendingRules); return &m_universalRules; }
     const WillBeHeapVector<RawPtrWillBeMember<StyleRulePage> >& pageRules() const { ASSERT(!m_pendingRules); return m_pageRules; }
     const WillBeHeapVector<RawPtrWillBeMember<StyleRuleViewport> >& viewportRules() const { ASSERT(!m_pendingRules); return m_viewportRules; }
     const WillBeHeapVector<RawPtrWillBeMember<StyleRuleFontFace> >& fontFaceRules() const { return m_fontFaceRules; }
     const WillBeHeapVector<RawPtrWillBeMember<StyleRuleKeyframes> >& keyframesRules() const { return m_keyframesRules; }
     const Vector<MinimalRuleData>& treeBoundaryCrossingRules() const { return m_treeBoundaryCrossingRules; }
     const Vector<MinimalRuleData>& shadowDistributedRules() const { return m_shadowDistributedRules; }
@@ skipping 15 matching lines @@
     struct RuleSetSelectorPair {
         RuleSetSelectorPair(const CSSSelector* selector, PassOwnPtr<RuleSet> ruleSet) : selector(selector), ruleSet(ruleSet) { }
         RuleSetSelectorPair(const RuleSetSelectorPair& rs) : selector(rs.selector), ruleSet(const_cast<RuleSetSelectorPair*>(&rs)->ruleSet.release()) { }
 
         const CSSSelector* selector;
         OwnPtr<RuleSet> ruleSet;
     };
 
 private:
     typedef HashMap<AtomicString, OwnPtr<LinkedStack<RuleData> > > PendingRuleMap;
-    typedef HashMap<AtomicString, OwnPtr<RuleData> > CompactRuleMap;
+    typedef HashMap<AtomicString, OwnPtr<TerminatedArray<RuleData> > > CompactRuleMap;
 
     RuleSet()
         : m_ruleCount(0)
     {
     }
 
     void addToRuleSet(const AtomicString& key, PendingRuleMap&, const RuleData&);
     void addPageRule(StyleRulePage*);
     void addViewportRule(StyleRuleViewport*);
     void addFontFaceRule(StyleRuleFontFace*);
@@ skipping 41 matching lines @@
     OwnPtr<PendingRuleMaps> m_pendingRules;
 
 #ifndef NDEBUG
     Vector<RuleData> m_allRules;
 #endif
 };
 
 } // namespace WebCore
 
 #endif // RuleSet_h