Auto merge of #20482 - brainlessdeveloper:list-style-image-computed, r=emilio

Implement a URL-generic type for ListStyleImage

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This should fix the following two "expected to fail" tests described in https://github.com/servo/servo/issues/18015:

- getComputedStyle(elem) for url() listStyleImage uses the resolved URL
  and elem.style uses the original URL

- getComputedStyle(elem) for url() listStyle uses the resolved URL
  and elem.style uses the original URL

I updated the test failure expectations by removing the corresponding `.ini` file.

---
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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #18015 (github issue number if applicable).

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- [x] There are tests for these changes OR
- [ ] These changes do not require tests because _____

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components/style/properties/longhand/box.mako.rs

@@ -613,7 +613,7 @@ ${helpers.single_keyword("-moz-appearance",
                          spec="Nonstandard (https://developer.mozilla.org/en-US/docs/Web/CSS/-moz-appearance)",
                          animation_value_type="discrete")}
 
-${helpers.predefined_type("-moz-binding", "UrlOrNone", "Either::Second(None_)",
+${helpers.predefined_type("-moz-binding", "url::UrlOrNone", "computed::url::UrlOrNone::none()",
                           products="gecko",
                           animation_value_type="none",
                           gecko_ffi_name="mBinding",

components/style/properties/longhand/inherited_svg.mako.rs

@@ -112,17 +112,17 @@ ${helpers.single_keyword("clip-rule", "nonzero evenodd",
                          animation_value_type="discrete",
                          spec="https://www.w3.org/TR/SVG11/masking.html#ClipRuleProperty")}
 
-${helpers.predefined_type("marker-start", "UrlOrNone", "Either::Second(None_)",
+${helpers.predefined_type("marker-start", "url::UrlOrNone", "computed::url::UrlOrNone::none()",
                           products="gecko",
                           animation_value_type="discrete",
                           spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties")}
 
-${helpers.predefined_type("marker-mid", "UrlOrNone", "Either::Second(None_)",
+${helpers.predefined_type("marker-mid", "url::UrlOrNone", "computed::url::UrlOrNone::none()",
                           products="gecko",
                           animation_value_type="discrete",
                           spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties")}
 
-${helpers.predefined_type("marker-end", "UrlOrNone", "Either::Second(None_)",
+${helpers.predefined_type("marker-end", "url::UrlOrNone", "computed::url::UrlOrNone::none()",
                           products="gecko",
                           animation_value_type="discrete",
                           spec="https://www.w3.org/TR/SVG2/painting.html#VertexMarkerProperties")}

components/style/properties/longhand/list.mako.rs

@@ -41,9 +41,9 @@ ${helpers.single_keyword("list-style-position", "outside inside", animation_valu
 % endif
 
 ${helpers.predefined_type("list-style-image",
-                          "ListStyleImage",
-                          initial_value="specified::ListStyleImage::none()",
-                          initial_specified_value="specified::ListStyleImage::none()",
+                          "url::ImageUrlOrNone",
+                          initial_value="computed::url::ImageUrlOrNone::none()",
+                          initial_specified_value="specified::url::ImageUrlOrNone::none()",
                           animation_value_type="discrete",
                           spec="https://drafts.csswg.org/css-lists/#propdef-list-style-image",
                           servo_restyle_damage="rebuild_and_reflow")}