Move border-*-width out of BorderValue and store on SurroundData in ComputedStyle instead

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 51 matching lines @@
     },
 
     // - field_group
     // Name of the group that this field belongs to. Fields in the same group are stored
     // together as a nested class inside ComputedStyle and dynamically allocated on use.
     // Leave this out if the field is stored directly on ComputedStyle.
     field_group: {
       value_type: "str"
     },
 
+    // - field_size
+    // Number of bits needed to store this field. Only used for storage_only
+    // fields. If specified, the field will be stored as bit field. Otherwise
+    // it will be stored as a normal data member.
+    field_size: {
+      valid_type: "int",
+    },
+
     // - field_template
     // Affects how the interface to this field is generated.
     // TODO(sashab, meade): Remove this once TypedOM types are specified for
     // every property, since this value can be inferred from that.
     field_template: {
       valid_values: [
         // Field is stored as an enum and has a initial/getter/setter/resetter.
         "keyword",
         // Field stores a primitive value like int/bool. The type is specified by
         // type_name. The interface has a initial/getter/setter/resetter.
@@ skipping 593 matching lines @@
       typedom_types: ["Image"],
     },
     {
       name: "border-bottom-width",
       api_class: "CSSPropertyAPIBorderWidth",
       converter: "ConvertLineWidth<float>",
       initial: "InitialBorderWidth",
       interpolable: true,
       keywords: ["thin", "medium", "thick"],
       typedom_types: ["Length"],
+      field_template: "storage_only",
+      type_name: "unsigned",
+      field_size : 26,
+      default_value: "WidthToFixedPoint(3)",
+      field_group: "surround",
     },
     {
       name: "border-collapse",
       independent: true,
       inherited: true,
       default_value: "separate",
       field_template: "keyword",
       keywords: ["separate", "collapse"],
     },
     {
@@ skipping 41 matching lines @@
       typedom_types: ["Image"],
     },
     {
       name: "border-left-width",
       api_class: "CSSPropertyAPIBorderWidth",
       converter: "ConvertLineWidth<float>",
       initial: "InitialBorderWidth",
       interpolable: true,
       keywords: ["thin", "medium", "thick"],
       typedom_types: ["Length"],
+      field_template: "storage_only",
+      type_name: "unsigned",
+      field_size : 26,
+      default_value: "WidthToFixedPoint(3)",
+      field_group: "surround",
     },
     {
       name: "border-right-color",
       custom_all: true,
       interpolable: true,
     },
     {
       name: "border-right-style",
       initial: "InitialBorderStyle",
       type_name: "EBorderStyle",
       keywords: ["none"],
       typedom_types: ["Image"],
     },
     {
       name: "border-right-width",
       api_class: "CSSPropertyAPIBorderWidth",
       converter: "ConvertLineWidth<float>",
       initial: "InitialBorderWidth",
       interpolable: true,
       keywords: ["thin", "medium", "thick"],
       typedom_types: ["Length"],
+      field_template: "storage_only",
+      type_name: "unsigned",
+      field_size : 26,
+      default_value: "WidthToFixedPoint(3)",
+      field_group: "surround",
     },
     {
       name: "border-top-color",
       custom_all: true,
       interpolable: true,
     },
     {
       name: "border-top-left-radius",
       api_class: "CSSPropertyAPIBorderRadius",
       api_methods: ["parseSingleValue"],
@@ skipping 24 matching lines @@
     },
     {
       name: "border-top-width",
       api_class: "CSSPropertyAPIBorderWidth",
       converter: "ConvertLineWidth<float>",
       initial: "InitialBorderWidth",
       interpolable: true,
       keywords: ["thin", "medium", "thick"],
       supports_percentage: true,
       typedom_types: ["Length"],
+      field_template: "storage_only",
+      type_name: "unsigned",
+      field_size : 26,
+      default_value: "WidthToFixedPoint(3)",
+      field_group: "surround",
     },
     {
       name: "bottom",
       api_class: "CSSPropertyAPIMargin",
       api_methods: ["parseSingleValue"],
       converter: "ConvertLengthOrAuto",
       interpolable: true,
       keywords: ["auto"],
       supports_percentage: true,
       typedom_types: ["Length"],
@@ skipping 2408 matching lines @@
     {
       name: "-webkit-transition-timing-function",
       alias_for: "transition-timing-function",
     },
     {
       name: "-webkit-user-select",
       alias_for: "user-select",
     },
   ],
 }