Generate StyleVisualData in ComputedStyleBase.

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 525 matching lines @@
       priority: "High",
       type_name: "TextRenderingMode",
     },
     {
       name: "zoom",
       api_class: true,
       api_methods: ["parseSingleValue"],
       custom_all: true,
       is_descriptor: true,
       priority: "High",
+      field_template: "storage_only",
+      type_name: "float",
+      default_value: "1.0",
+      field_group: "visual",
     },
 
     {
       name: "align-content",
       api_methods: ["parseSingleValue"],
       api_class: "CSSPropertyAPIAlignOrJustifyContent",
       converter: "ConvertContentAlignmentData",
       initial: "InitialContentAlignment",
     },
     {
@@ skipping 315 matching lines @@
       field_template: "keyword",
       keywords: ["none", "left", "right", "both"],
     },
     {
       name: "clip",
       api_class: true,
       api_methods: ["parseSingleValue"],
       converter: "ConvertClip",
       custom_all: true,
       interpolable: true,
+      field_template: "storage_only",
+      field_type_path: "platform/LengthBox",
+      default_value: "LengthBox()",
+      field_group: "visual",
     },
     {
       name: "clip-path",
       api_class: true,
       api_methods: ["parseSingleValue"],
       converter: "ConvertClipPath",
       interpolable: true,
     },
     {
       name: "clip-rule",
@@ skipping 2346 matching lines @@
     {
       name: "-webkit-transition-timing-function",
       alias_for: "transition-timing-function",
     },
     {
       name: "-webkit-user-select",
       alias_for: "user-select",
     },
   ],
 }