Compute initial values for registered custom properties.

third_party/WebKit/Source/core/css/resolver/StyleBuilderConverter.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  *     * 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
  * copyright notice, this list of conditions and the following disclaimer
  * in the documentation and/or other materials provided with the
  * distribution.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 176 matching lines @@
   static RespectImageOrientationEnum convertImageOrientation(
       StyleResolverState&,
       const CSSValue&);
   static PassRefPtr<StylePath> convertPathOrNone(StyleResolverState&,
                                                  const CSSValue&);
   static StyleOffsetRotation convertOffsetRotate(const CSSValue&);
   template <CSSValueID cssValueFor0, CSSValueID cssValueFor100>
   static Length convertPositionLength(StyleResolverState&, const CSSValue&);
   static Rotation convertRotation(const CSSValue&);
 
+  static const CSSValue& convertRegisteredPropertyInitialValue(const CSSValue&);
   static const CSSValue& convertRegisteredPropertyValue(
       const StyleResolverState&,
       const CSSValue&);
 };
 
 template <typename T>
 T StyleBuilderConverter::convertComputedLength(StyleResolverState& state,
                                                const CSSValue& value) {
   return toCSSPrimitiveValue(value).computeLength<T>(
       state.cssToLengthConversionData());
@@ skipping 74 matching lines @@
                                                   const CSSValue& value) {
   if (value.isStringValue())
     return AtomicString(toCSSStringValue(value).value());
   DCHECK_EQ(toCSSIdentifierValue(value).getValueID(), IdForNone);
   return nullAtom;
 }
 
 }  // namespace blink
 
 #endif