SVG Web Animations: Add SVGNumberOptionalNumberInterpolationType

third_party/WebKit/Source/core/svg/SVGNumberOptionalNumber.h

 /*
  * Copyright (C) 2014 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 41 matching lines @@
 
     String valueAsString() const override;
     void setValueAsString(const String&, ExceptionState&);
 
     void add(PassRefPtrWillBeRawPtr<SVGPropertyBase>, SVGElement*) override;
     void calculateAnimatedValue(SVGAnimationElement*, float percentage, unsigned repeatCount, PassRefPtrWillBeRawPtr<SVGPropertyBase> from, PassRefPtrWillBeRawPtr<SVGPropertyBase> to, PassRefPtrWillBeRawPtr<SVGPropertyBase> toAtEndOfDurationValue, SVGElement* contextElement) override;
     float calculateDistance(PassRefPtrWillBeRawPtr<SVGPropertyBase> to, SVGElement* contextElement) override;
 
     static AnimatedPropertyType classType() { return AnimatedNumberOptionalNumber; }
 
-    PassRefPtrWillBeRawPtr<SVGNumber> firstNumber() { return m_firstNumber; }
-    PassRefPtrWillBeRawPtr<SVGNumber> secondNumber() { return m_secondNumber; }
+    PassRefPtrWillBeRawPtr<SVGNumber> firstNumber() const { return m_firstNumber; }
+    PassRefPtrWillBeRawPtr<SVGNumber> secondNumber() const { return m_secondNumber; }
 
     DECLARE_VIRTUAL_TRACE();
 
 protected:
     SVGNumberOptionalNumber(PassRefPtrWillBeRawPtr<SVGNumber> firstNumber, PassRefPtrWillBeRawPtr<SVGNumber> secondNumber);
 
     RefPtrWillBeMember<SVGNumber> m_firstNumber;
     RefPtrWillBeMember<SVGNumber> m_secondNumber;
 };
 
 inline PassRefPtrWillBeRawPtr<SVGNumberOptionalNumber> toSVGNumberOptionalNumber(PassRefPtrWillBeRawPtr<SVGPropertyBase> passBase)
 {
     RefPtrWillBeRawPtr<SVGPropertyBase> base = passBase;
     ASSERT(base->type() == SVGNumberOptionalNumber::classType());
     return static_pointer_cast<SVGNumberOptionalNumber>(base.release());
 }
 
+inline const SVGNumberOptionalNumber& toSVGNumberOptionalNumber(const SVGPropertyBase& base)
+{
+    ASSERT(base.type() == SVGNumberOptionalNumber::classType());
+    return static_cast<const SVGNumberOptionalNumber&>(base);
+}
+
 } // namespace blink
 
 #endif // SVGNumberOptionalNumber_h