Added parseShorthand method from the parser to CSSPropertyAPI.h.

third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.h

Index: third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.h
diff --git a/third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.h b/third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.h
index d5cb6bd8fe52768b16808dd36ce71ff57c25054e..55c506ece5180104610878a8dd411bf5ec326905 100644
--- a/third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.h
+++ b/third_party/WebKit/Source/core/css/properties/CSSPropertyDescriptor.h
@@ -10,17 +10,14 @@ class CSSValue;
 class CSSParserTokenRange;
 class CSSParserContext;
 
+#define FUNCTION_IMPLEMENTED_FOR_PROPERTY(function, descriptor) \
+  descriptor.function != CSSPropertyAPI::function
+
 // Stores function pointers matching those declared in CSSPropertyAPI.
 struct CSSPropertyDescriptor {
   const CSSValue* (*parseSingleValue)(CSSParserTokenRange&,
                                       const CSSParserContext*);
-
-  // Stores whether or not this descriptor is for a valid property. Do not
-  // access the contents of this descriptor unless this value is true.
-  // TODO(aazzam): Remove this once the switch in
-  // CSSPropertyParser::parseSingleValue() has been completely replaced by
-  // CSSPropertyDescriptors.
-  bool temporaryCanReadValue;
+  bool (*parseShorthand)(bool, CSSParserTokenRange&, const CSSParserContext*);
 
   // Returns the corresponding CSSPropertyDescriptor for a given CSSPropertyID.
   // Use this function to access the API for a property. Returns a descriptor