Add initial/inherit/unset tests to font-family-parse-keyword.html

Source/core/css/parser/CSSPropertyParser.cpp

 /*
  * Copyright (C) 2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
  * Copyright (C) 2012 Intel Corporation. All rights reserved.
  *
@@ skipping 3180 matching lines @@
         }
     }
     if ((propId == CSSPropertyTransitionProperty || propId == CSSPropertyWebkitTransitionProperty) && !isValidTransitionPropertyList(list.get()))
         return nullptr;
     ASSERT(list->length());
     return list.release();
 }
 
 static inline bool isCSSWideKeyword(CSSParserValue& value)
 {
-    return value.id == CSSValueInitial || value.id == CSSValueInherit || value.id == CSSValueDefault;
+    return value.id == CSSValueInitial || value.id == CSSValueInherit || value.id == CSSValueUnset || value.id == CSSValueDefault;
 }
 
 static inline bool isValidCustomIdentForGridPositions(CSSParserValue& value)
 {
     // FIXME: we need a more general solution for <custom-ident> in all properties.
     return value.unit == CSSPrimitiveValue::CSS_IDENT && value.id != CSSValueSpan && value.id != CSSValueAuto && !isCSSWideKeyword(value);
 }
 
 // The function parses [ <integer> || <custom-ident> ] in <grid-line> (which can be stand alone or with 'span').
 bool CSSPropertyParser::parseIntegerOrCustomIdentFromGridPosition(RefPtrWillBeRawPtr<CSSPrimitiveValue>& numericValue, RefPtrWillBeRawPtr<CSSPrimitiveValue>& gridLineName)
@@ skipping 5278 matching lines @@
         }
     }
 
     if (!list->length())
         return nullptr;
 
     return list.release();
 }
 
 } // namespace blink