Oilpan: mark StylePropertySet::PropertyReference as stack allocated.

Source/core/css/StylePropertySet.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008, 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 38 matching lines @@
     // destructor. This can be removed once the MutableStylePropertySet's OwnPtr is moved
     // to the heap.
     void finalizeGarbageCollectedObject();
 #else
     // Override RefCounted's deref() to ensure operator delete is called on
     // the appropriate subclass type.
     void deref();
 #endif
 
     class PropertyReference {
+        STACK_ALLOCATED();
     public:
         PropertyReference(const StylePropertySet& propertySet, unsigned index)
-            : m_propertySet(propertySet)
+            : m_propertySet(&propertySet)
             , m_index(index)
         {
         }
 
         CSSPropertyID id() const { return static_cast<CSSPropertyID>(propertyMetadata().m_propertyID); }
         CSSPropertyID shorthandID() const { return propertyMetadata().shorthandID(); }
 
         bool isImportant() const { return propertyMetadata().m_important; }
         bool isInherited() const { return propertyMetadata().m_inherited; }
         bool isImplicit() const { return propertyMetadata().m_implicit; }
 
         const CSSValue* value() const { return propertyValue(); }
         // FIXME: We should try to remove this mutable overload.
         CSSValue* value() { return const_cast<CSSValue*>(propertyValue()); }
 
         // FIXME: Remove this.
         CSSProperty toCSSProperty() const { return CSSProperty(propertyMetadata(), const_cast<CSSValue*>(propertyValue())); }
 
         const StylePropertyMetadata& propertyMetadata() const;
 
     private:
         const CSSValue* propertyValue() const;
 
-        const StylePropertySet& m_propertySet;
+        RawPtrWillBeMember<const StylePropertySet> m_propertySet;
         unsigned m_index;
     };
 
     unsigned propertyCount() const;
     bool isEmpty() const;
     PropertyReference propertyAt(unsigned index) const { return PropertyReference(*this, index); }
     int findPropertyIndex(CSSPropertyID) const;
     bool hasProperty(CSSPropertyID property) const { return findPropertyIndex(property) != -1; }
 
     PassRefPtrWillBeRawPtr<CSSValue> getPropertyCSSValue(CSSPropertyID) const;
@@ skipping 147 matching lines @@
     return toMutableStylePropertySet(set.get());
 }
 
 inline MutableStylePropertySet* toMutableStylePropertySet(const Member<StylePropertySet>& set)
 {
     return toMutableStylePropertySet(set.get());
 }
 
 inline const StylePropertyMetadata& StylePropertySet::PropertyReference::propertyMetadata() const
 {
-    if (m_propertySet.isMutable())
-        return toMutableStylePropertySet(m_propertySet).m_propertyVector.at(m_index).metadata();
-    return toImmutableStylePropertySet(m_propertySet).metadataArray()[m_index];
+    if (m_propertySet->isMutable())
+        return toMutableStylePropertySet(*m_propertySet).m_propertyVector.at(m_index).metadata();
+    return toImmutableStylePropertySet(*m_propertySet).metadataArray()[m_index];
 }
 
 inline const CSSValue* StylePropertySet::PropertyReference::propertyValue() const
 {
-    if (m_propertySet.isMutable())
-        return toMutableStylePropertySet(m_propertySet).m_propertyVector.at(m_index).value();
-    return toImmutableStylePropertySet(m_propertySet).valueArray()[m_index];
+    if (m_propertySet->isMutable())
+        return toMutableStylePropertySet(*m_propertySet).m_propertyVector.at(m_index).value();
+    return toImmutableStylePropertySet(*m_propertySet).valueArray()[m_index];
 }
 
 inline unsigned StylePropertySet::propertyCount() const
 {
     if (m_isMutable)
         return toMutableStylePropertySet(this)->m_propertyVector.size();
     return m_arraySize;
 }
 
 inline bool StylePropertySet::isEmpty() const
@@ skipping 17 matching lines @@
 inline int StylePropertySet::findPropertyIndex(CSSPropertyID propertyID) const
 {
     if (m_isMutable)
         return toMutableStylePropertySet(this)->findPropertyIndex(propertyID);
     return toImmutableStylePropertySet(this)->findPropertyIndex(propertyID);
 }
 
 } // namespace blink
 
 #endif // StylePropertySet_h