Do not accept CSS-wide keywords for descriptors

third_party/WebKit/Source/core/css/CSSProperty.cpp

 /**
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006 Apple Computer, Inc.
  *
  * 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,
@@ skipping 212 matching lines @@
 {
     if (propertyID == CSSPropertyAll)
         return false;
 
     if (!CSSPropertyMetadata::isEnabledProperty(propertyID))
         return false;
 
     if (propertyID == CSSPropertyVariable)
         return false;
 
+    if (CSSPropertyMetadata::isDescriptorOnly(propertyID))
+        return false;
+
     // all shorthand spec says:
     // The all property is a shorthand that resets all CSS properties except
     // direction and unicode-bidi. It only accepts the CSS-wide keywords.
     // c.f. http://dev.w3.org/csswg/css-cascade/#all-shorthand
     // So CSSPropertyUnicodeBidi and CSSPropertyDirection are not
     // affected by all property.
     return propertyID != CSSPropertyUnicodeBidi && propertyID != CSSPropertyDirection;
 }
 
 bool CSSProperty::operator==(const CSSProperty& other) const
 {
     return m_value->equals(*other.m_value) && isImportant() == other.isImportant();
 }
 
 } // namespace blink