Move most of the [Pass]RefPtr's of CSSPrimitiveValue to our transition types.

Source/core/editing/EditingStyle.cpp

 /*
  * Copyright (C) 2007, 2008, 2009 Apple Computer, Inc.
  * Copyright (C) 2010, 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 151 matching lines @@
     virtual bool hasAttribute() const { return false; }
     virtual bool propertyExistsInStyle(const StylePropertySet* style) const { return style->getPropertyCSSValue(m_propertyID); }
     virtual bool valueIsPresentInStyle(Element*, StylePropertySet*) const;
     virtual void addToStyle(Element*, EditingStyle*) const;
 
 protected:
     HTMLElementEquivalent(CSSPropertyID);
     HTMLElementEquivalent(CSSPropertyID, const QualifiedName& tagName);
     HTMLElementEquivalent(CSSPropertyID, CSSValueID primitiveValue, const QualifiedName& tagName);
     const CSSPropertyID m_propertyID;
-    const RefPtr<CSSPrimitiveValue> m_primitiveValue;
+    const RefPtrWillBePersistent<CSSPrimitiveValue> m_primitiveValue;
     const QualifiedName* m_tagName; // We can store a pointer because HTML tag names are const global.
 };
 
 HTMLElementEquivalent::HTMLElementEquivalent(CSSPropertyID id)
     : m_propertyID(id)
     , m_tagName(0)
 {
 }
 
 HTMLElementEquivalent::HTMLElementEquivalent(CSSPropertyID id, const QualifiedName& tagName)
@@ skipping 1449 matching lines @@
 {
     for (Node* ancestor = node; ancestor; ancestor = ancestor->parentNode()) {
         RefPtr<CSSComputedStyleDeclaration> ancestorStyle = CSSComputedStyleDeclaration::create(ancestor);
         if (!hasTransparentBackgroundColor(ancestorStyle.get()))
             return ancestorStyle->getPropertyCSSValue(CSSPropertyBackgroundColor);
     }
     return 0;
 }
 
 }