Generate getters/setters for (/min/max)(width/height).

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 1204 matching lines @@
     },
     {
       name: "height",
       api_class: "CSSPropertyAPIWidthOrHeight",
       converter: "ConvertLengthSizing",
       is_descriptor: true,
       interpolable: true,
       keywords: ["auto", "fit-content", "min-content", "max-content"],
       supports_percentage: true,
       typedom_types: ["Length"],
-      field_template: "storage_only",
+      field_template: "external",
       field_type_path: "platform/Length",
       field_group: "box",
       default_value: "Length()",
     },
     {
       name: "hyphens",
       inherited: true,
       runtime_flag: "CSSHyphens",
       type_name: "Hyphens",
     },
@@ skipping 190 matching lines @@
     },
     {
       name: "mask-type",
       svg: true,
     },
     {
       name: "max-height",
       converter: "ConvertLengthMaxSizing",
       is_descriptor: true,
       interpolable: true,
-      field_template: "storage_only",
+      field_template: "external",
       field_type_path: "platform/Length",
       field_group: "box",
       default_value: "Length(kMaxSizeNone)",
     },
     {
       name: "max-width",
       converter: "ConvertLengthMaxSizing",
       is_descriptor: true,
       interpolable: true,
-      field_template: "storage_only",
+      field_template: "external",
       field_type_path: "platform/Length",
       field_group: "box",
       default_value: "Length(kMaxSizeNone)",
     },
     {
       name: "min-height",
       api_class: "CSSPropertyAPIWidthOrHeight",
       converter: "ConvertLengthSizing",
       is_descriptor: true,
       interpolable: true,
-      field_template: "storage_only",
+      field_template: "external",
       field_type_path: "platform/Length",
       field_group: "box",
       default_value: "Length()",
     },
     {
       name: "min-width",
       api_class: "CSSPropertyAPIWidthOrHeight",
       converter: "ConvertLengthSizing",
       is_descriptor: true,
       interpolable: true,
-      field_template: "storage_only",
+      field_template: "external",
       field_type_path: "platform/Length",
       field_group: "box",
       default_value: "Length()",
     },
     {
       name: "mix-blend-mode",
       name_for_methods: "BlendMode",
       type_name: "blink::WebBlendMode",
     },
     {
@@ skipping 1030 matching lines @@
     },
     {
       name: "width",
       api_class: "CSSPropertyAPIWidthOrHeight",
       converter: "ConvertLengthSizing",
       is_descriptor: true,
       interpolable: true,
       keywords: ["auto", "fit-content", "min-content", "max-content"],
       supports_percentage: true,
       typedom_types: ["Length"],
-      field_template: "storage_only",
+      field_template: "external",
       field_type_path: "platform/Length",
       field_group: "box",
       default_value: "Length()"
     },
     {
       name: "will-change",
       api_class: true,
       api_methods: ["parseSingleValue"],
       custom_all: true,
     },
@@ skipping 778 matching lines @@
     {
       name: "-webkit-transition-timing-function",
       alias_for: "transition-timing-function",
     },
     {
       name: "-webkit-user-select",
       alias_for: "user-select",
     },
   ],
 }