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

Source/core/svg/SVGLength.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  *
  * 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGLength_h
 #define SVGLength_h
 
 #include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/svg/SVGLengthContext.h"
 #include "core/svg/properties/NewSVGProperty.h"
+#include "heap/Handle.h"
 
 namespace WebCore {
 
 class CSSPrimitiveValue;
 class ExceptionState;
 class QualifiedName;
 
 enum SVGLengthNegativeValuesMode {
     AllowNegativeLengths,
     ForbidNegativeLengths
@@ skipping 45 matching lines @@
             || m_unitType == LengthTypeEMS
             || m_unitType == LengthTypeEXS;
     }
 
     bool isZero() const
     {
         return !m_valueInSpecifiedUnits;
     }
 
     static PassRefPtr<SVGLength> fromCSSPrimitiveValue(CSSPrimitiveValue*);
-    static PassRefPtr<CSSPrimitiveValue> toCSSPrimitiveValue(PassRefPtr<SVGLength>);
+    static PassRefPtrWillBeRawPtr<CSSPrimitiveValue> toCSSPrimitiveValue(PassRefPtr<SVGLength>);
     static SVGLengthMode lengthModeForAnimatedLengthAttribute(const QualifiedName&);
 
     PassRefPtr<SVGLength> blend(PassRefPtr<SVGLength> from, float progress) const;
 
     virtual void add(PassRefPtr<NewSVGPropertyBase>, SVGElement*) OVERRIDE;
     virtual void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtr<NewSVGPropertyBase> from, PassRefPtr<NewSVGPropertyBase> to, PassRefPtr<NewSVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement) OVERRIDE;
     virtual float calculateDistance(PassRefPtr<NewSVGPropertyBase> to, SVGElement* contextElement) OVERRIDE;
 
     static AnimatedPropertyType classType() { return AnimatedLength; }
 
 private:
     SVGLength(SVGLengthMode);
     SVGLength(const SVGLength&);
 
     float m_valueInSpecifiedUnits;
     unsigned m_unitMode : 2;
     unsigned m_unitType : 4;
 };
 
 inline PassRefPtr<SVGLength> toSVGLength(PassRefPtr<NewSVGPropertyBase> passBase)
 {
     RefPtr<NewSVGPropertyBase> base = passBase;
     ASSERT(base->type() == SVGLength::classType());
     return static_pointer_cast<SVGLength>(base.release());
 }
 
 } // namespace WebCore
 
 #endif // SVGLength_h