Oilpan: Reapply: Remove all the RefPtrs and most of the raw pointers to style

Source/core/css/ElementRuleCollector.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 29 matching lines @@
 class SelectorFilter;
 class StaticCSSRuleList;
 
 typedef unsigned CascadeScope;
 typedef unsigned CascadeOrder;
 
 const CascadeScope ignoreCascadeScope = 0;
 const CascadeOrder ignoreCascadeOrder = 0;
 
 class MatchedRule {
-    WTF_MAKE_FAST_ALLOCATED;
+    ALLOW_ONLY_INLINE_ALLOCATION();
 public:
-    explicit MatchedRule(const RuleData* ruleData, unsigned specificity, CascadeScope cascadeScope, CascadeOrder cascadeOrder, unsigned styleSheetIndex, const CSSStyleSheet* parentStyleSheet)
+    MatchedRule(const RuleData* ruleData, unsigned specificity, CascadeScope cascadeScope, CascadeOrder cascadeOrder, unsigned styleSheetIndex, const CSSStyleSheet* parentStyleSheet)
         : m_ruleData(ruleData)
         , m_specificity(specificity)
         , m_cascadeScope(cascadeScope)
         , m_parentStyleSheet(parentStyleSheet)
     {
         ASSERT(m_ruleData);
         static const unsigned BitsForPositionInRuleData = 18;
         static const unsigned BitsForStyleSheetIndex = 32;
         m_position = ((uint64_t)cascadeOrder << (BitsForStyleSheetIndex + BitsForPositionInRuleData)) + ((uint64_t)styleSheetIndex << BitsForPositionInRuleData)+ m_ruleData->position();
     }
 
     const RuleData* ruleData() const { return m_ruleData; }
     uint32_t cascadeScope() const { return m_cascadeScope; }
     uint64_t position() const { return m_position; }
     unsigned specificity() const { return ruleData()->specificity() + m_specificity; }
     const CSSStyleSheet* parentStyleSheet() const { return m_parentStyleSheet; }
+    void trace(Visitor* visitor)
+    {
+        visitor->trace(m_parentStyleSheet);
+    }
 
 private:
+    // FIXME: Oilpan: RuleData is in the oilpan heap and this pointer
+    // really should be traced. However, RuleData objects are
+    // allocated inside larger TerminatedArray objects and we cannot
+    // trace a raw rule data pointer at this point.
     const RuleData* m_ruleData;
     unsigned m_specificity;
     CascadeScope m_cascadeScope;
     uint64_t m_position;
-    const CSSStyleSheet* m_parentStyleSheet;
+    RawPtrWillBeMember<const CSSStyleSheet> m_parentStyleSheet;
 };
 
+} // namespace WebCore
+
+
+namespace WTF {
+
+template <> struct VectorTraits<WebCore::MatchedRule> : VectorTraitsBase<WebCore::MatchedRule> {
+    static const bool canInitializeWithMemset = true;
+    static const bool canMoveWithMemcpy = true;
+};
+
+} // namespace WTF
+
+namespace WebCore {
+
 // FIXME: oilpan: when transition types are gone this class can be replaced with HeapVector.
 class StyleRuleList : public RefCounted<StyleRuleList> {
 public:
     static PassRefPtr<StyleRuleList> create() { return adoptRef(new StyleRuleList()); }
     WillBePersistentHeapVector<RawPtrWillBeMember<StyleRule> > m_list;
 };
 
 // ElementRuleCollector is designed to be used as a stack object.
 // Create one, ask what rules the ElementResolveContext matches
 // and then let it go out of scope.
@@ skipping 55 matching lines @@
     const ElementResolveContext& m_context;
     const SelectorFilter& m_selectorFilter;
     RefPtr<RenderStyle> m_style; // FIXME: This can be mutated during matching!
 
     PseudoStyleRequest m_pseudoStyleRequest;
     SelectorChecker::Mode m_mode;
     bool m_canUseFastReject;
     bool m_sameOriginOnly;
     bool m_matchingUARules;
 
-    OwnPtr<Vector<MatchedRule, 32> > m_matchedRules;
+    OwnPtrWillBeMember<WillBeHeapVector<MatchedRule, 32> > m_matchedRules;
 
     // Output.
     RefPtrWillBeMember<StaticCSSRuleList> m_cssRuleList;
     RefPtr<StyleRuleList> m_styleRuleList;
     MatchResult m_result;
 };
 
 } // namespace WebCore
 
 #endif // ElementRuleCollector_h