third_party/blink/renderer/core/css/computed_style_field_aliases.json5

{
// This file specifies all alias used in css_properties.json5, these alias
// replace frequently used combination of property.
    "parameters": {
    },
    "data": [
        {
            "name": "<length>",
            "field_template": "external",
            "type_name": "Length",
            "include_paths": ["third_party/blink/renderer/platform/geometry/length.h"]
        },
        {
            "name": "<color>",
            "field_template": "external",
            "type_name": "Color",
            "include_paths": ["third_party/blink/renderer/platform/graphics/color.h"],
        }
    ]
}