Bug 1800969 - Alias -webkit-clip-path to clip-path for webcompat; r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D162674

devtools/shared/css/generated/properties-db.js

@@ -1916,6 +1916,34 @@ exports.CSS_PROPERTIES = {
       "unset"
     ]
   },
+  "-webkit-clip-path": {
+    "isInherited": false,
+    "subproperties": [
+      "clip-path"
+    ],
+    "supports": [],
+    "values": [
+      "border-box",
+      "circle",
+      "content-box",
+      "ellipse",
+      "fill-box",
+      "inherit",
+      "initial",
+      "inset",
+      "margin-box",
+      "none",
+      "padding-box",
+      "path",
+      "polygon",
+      "revert",
+      "revert-layer",
+      "stroke-box",
+      "unset",
+      "url",
+      "view-box"
+    ]
+  },
   "-webkit-filter": {
     "isInherited": false,
     "subproperties": [

layout/style/test/property_database.js

@@ -11092,6 +11092,13 @@ var gCSSProperties = {
     alias_for: "animation-timing-function",
     subproperties: ["animation-timing-function"],
   },
+  "-webkit-clip-path": {
+    domProp: "webkitClipPath",
+    inherited: false,
+    type: CSS_TYPE_SHORTHAND_AND_LONGHAND,
+    alias_for: "clip-path",
+    subproperties: ["clip-path"],
+  },
   "-webkit-filter": {
     domProp: "webkitFilter",
     inherited: false,

servo/components/style/properties/counted_unknown_properties.py

@@ -19,7 +19,6 @@ COUNTED_UNKNOWN_PROPERTIES = [
     "text-size-adjust",
     "-webkit-font-feature-settings",
     "-webkit-user-drag",
-    "-webkit-clip-path",
     "orphans",
     "widows",
     "-webkit-user-modify",

servo/components/style/properties/longhands/svg.mako.rs

@@ -80,6 +80,7 @@ ${helpers.predefined_type(
     "basic_shape::ClipPath",
     "generics::basic_shape::ClipPath::None",
     engines="gecko",
+    extra_prefixes="webkit",
     animation_value_type="basic_shape::ClipPath",
     spec="https://drafts.fxtf.org/css-masking/#propdef-clip-path",
 )}