Added parseShorthand method from the parser to CSSPropertyAPI.h.

third_party/WebKit/Source/core/css/CSSProperties.json5

 {
 // This file specifies all the CSS properties we support and the necessary
 // information for our code generation. The various supported arguments
 // are described below with example usage
 
   parameters: {
     // - alias_for: "other-property"
     // Properties specifying alias_for should be virtually identical to the
     // properties they alias. Minor parsing differences are allowed as long as
     // the CSSValues created are of the same format of the aliased property.
@@ skipping 34 matching lines @@
     // - api_methods: ["method1", "method2"]
     // List of methods that are implemented in the CSSPropertyAPI for this property.
     // This is used by make_css_property_apis.py to specify which functions are defined
     // in the .h file for this property, and also used in CSSPropertyAPIFiles.h.tmpl to
     // generate declarations for only the methods this property has implementations for.
     api_methods: {
       default: [],
       valid_type: "list",
        // This list must be an ordered, complete list of methods whose names match those
        // defined in CSSPropertyDescriptor.h.
-      valid_values: ["parseSingleValue"],
+      valid_values: ["parseSingleValue", "parseShorthand"],
     },
 
     // - keyword_only
     // These properties only store keyword values. This is used when
     // generating the ComputedStyle storage for the property. The initial
     // value for this property on a ComputedStyle is specified with the
     // initial_keyword flag below.
     // TODO(sashab): Rename this to field_type=keyword once we support
     // multiple types of generatable fields in ComputedStyle
     // TODO(sashab, meade): Remove this once TypedOM types are specified for
@@ skipping 449 matching lines @@
       name: "align-content",
       converter: "convertContentAlignmentData",
       initial: "initialContentAlignment",
     },
     {
       name: "align-items",
       api_class: true,
       api_methods: ["parseSingleValue"],
       converter: "convertSelfOrDefaultAlignmentData",
       initial: "initialDefaultAlignment",
-      api_class: true,
     },
     {
       name: "alignment-baseline",
       svg: true,
     },
     {
       api_class: "CSSPropertyAPIAlignOrJustifySelf",
       api_methods: ["parseSingleValue"],
       name: "align-self",
       converter: "convertSelfOrDefaultAlignmentData",
@@ skipping 530 matching lines @@
       converter: "convertContentAlignmentData",
       initial: "initialContentAlignment",
     },
     {
       name: "justify-items",
       api_class: true,
       api_methods: ["parseSingleValue"],
       converter: "convertSelfOrDefaultAlignmentData",
       initial: "initialSelfAlignment",
       runtime_flag: "CSSGridLayout",
-      api_class: true,
     },
     {
       name: "justify-self",
       api_class: "CSSPropertyAPIAlignOrJustifySelf",
       api_methods: ["parseSingleValue"],
       converter: "convertSelfOrDefaultAlignmentData",
       initial: "initialSelfAlignment",
       runtime_flag: "CSSGridLayout",
     },
     {
@@ skipping 1884 matching lines @@
     {
       name: "-webkit-transition-timing-function",
       alias_for: "transition-timing-function",
     },
     {
       name: "-webkit-user-select",
       alias_for: "user-select",
     },
   ],
 }