Web Animations - responsive interpolation

Source/core/css/CSSPrimitiveValue.h

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.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.
  *
@@ skipping 173 matching lines @@
     bool isAttr() const { return m_primitiveUnitType == CSS_ATTR; }
     bool isCounter() const { return m_primitiveUnitType == CSS_COUNTER; }
     bool isFontIndependentLength() const { return m_primitiveUnitType >= CSS_PX && m_primitiveUnitType <= CSS_PC; }
     bool isFontRelativeLength() const
     {
         return m_primitiveUnitType == CSS_EMS
             || m_primitiveUnitType == CSS_EXS
             || m_primitiveUnitType == CSS_REMS
             || m_primitiveUnitType == CSS_CHS;
     }
+    bool isViewportPercentageLength() const { return isViewportPercentageLength(static_cast<UnitType>(m_primitiveUnitType)); }
     static bool isViewportPercentageLength(UnitType type) { return type >= CSS_VW && type <= CSS_VMAX; }
     static bool isLength(UnitType type)
     {
         return (type >= CSS_EMS && type <= CSS_PC) || type == CSS_REMS || type == CSS_CHS || isViewportPercentageLength(type);
     }
     bool isLength() const { return isLength(primitiveType()); }
     bool isNumber() const { return primitiveType() == CSS_NUMBER; }
     bool isPercentage() const { return primitiveType() == CSS_PERCENTAGE; }
     bool isPx() const { return primitiveType() == CSS_PX; }
     bool isRect() const { return m_primitiveUnitType == CSS_RECT; }
@@ skipping 220 matching lines @@
     } m_value;
 };
 
 typedef CSSPrimitiveValue::CSSLengthArray CSSLengthArray;
 
 DEFINE_CSS_VALUE_TYPE_CASTS(CSSPrimitiveValue, isPrimitiveValue());
 
 } // namespace WebCore
 
 #endif // CSSPrimitiveValue_h