Generate enum/getters/setters/mappings for box-decoration-break.

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 2162 matching lines @@
       api_methods: ["parseSingleValue"],
       converter: "ConvertComputedLength<short>",
       inherited: true,
       interpolable: true,
       name_for_methods: "VerticalBorderSpacing",
     },
     {
       name: "-webkit-box-align",
       type_name: "EBoxAlignment",
     },
-    "-webkit-box-decoration-break",
+    {
+      name: "-webkit-box-decoration-break",
+      field_template: "keyword",
+      field_group: "box",
+      keywords: ["slice", "clone"],
+      default_value: "slice",
+    },
     {
       name: "-webkit-box-direction",
       independent: true,
       inherited: true,
       default_value: "normal",
       field_template: "keyword",
       keywords: ["normal", "reverse"],
     },
     {
       name: "-webkit-box-flex",
@@ skipping 1121 matching lines @@
     {
       name: "-webkit-transition-timing-function",
       alias_for: "transition-timing-function",
     },
     {
       name: "-webkit-user-select",
       alias_for: "user-select",
     },
   ],
 }