CSSValue Immediates: Make CSSPrimitiveValue a container

Source/core/css/CSSContentDistributionValue.h

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CSSContentDistributionValue_h
 #define CSSContentDistributionValue_h
 
 #include "core/css/CSSValue.h"
 #include "core/css/CSSValuePool.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class CSSContentDistributionValue : public CSSValueObject {
 public:
     static PassRefPtrWillBeRawPtr<CSSContentDistributionValue> create(CSSValueID distribution, CSSValueID position, CSSValueID overflow)
     {
         return adoptRefWillBeNoop(new CSSContentDistributionValue(distribution, position, overflow));
     }
     ~CSSContentDistributionValue();
 
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> distribution() const { return cssValuePool().createIdentifierValue(m_distribution); }
+    CSSPrimitiveValue distribution() const { return cssValuePool().createIdentifierValue(m_distribution); }
 
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> position() const { return cssValuePool().createIdentifierValue(m_position); }
+    CSSPrimitiveValue position() const { return cssValuePool().createIdentifierValue(m_position); }
 
-    PassRefPtrWillBeRawPtr<CSSPrimitiveValue> overflow() const { return cssValuePool().createIdentifierValue(m_overflow); }
+    CSSPrimitiveValue overflow() const { return cssValuePool().createIdentifierValue(m_overflow); }
 
     String customCSSText() const;
 
     bool equals(const CSSContentDistributionValue&) const;
 
     DEFINE_INLINE_TRACE_AFTER_DISPATCH() { CSSValueObject::traceAfterDispatch(visitor); }
 
 private:
     CSSContentDistributionValue(CSSValueID distribution, CSSValueID position, CSSValueID overflow);
 
     CSSValueID m_distribution;
     CSSValueID m_position;
     CSSValueID m_overflow;
 };
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSContentDistributionValue, isContentDistributionValue());
 
 } // namespace blink
 
 #endif // CSSContentDistributionValue_h