Add basic support for enumerating computed styles (#31499)

* Add basic support for enumerating computed styles

The old code was so broken, it was enumerating the style attribute
instead of the computed styles.

So this patch implements a basic enumeration, but not including custom
properties whose computed value is not the guaranteed-invalid value.

* Feedback

tests/wpt/meta/css/cssom/cssstyledeclaration-csstext.html.ini

@@ -1,3 +0,0 @@
-[cssstyledeclaration-csstext.html]
-  [cssText on computed style declaration returns the empty string]
-    expected: FAIL

tests/wpt/meta/css/cssom/cssstyledeclaration-custom-properties.html.ini

@@ -0,0 +1,3 @@
+[cssstyledeclaration-custom-properties.html]
+  [Custom properties are included in computed style]
+    expected: FAIL

tests/wpt/meta/css/cssom/getComputedStyle-detached-subtree.html.ini

@@ -6,3 +6,5 @@
   [getComputedStyle returns no style for element in non-rendered iframe (display: none)]
     expected: FAIL
 
+  [getComputedStyle returns no style for detached element]
+    expected: FAIL

tests/wpt/meta/css/cssom/getComputedStyle-getter-v-properties.tentative.html.ini

@@ -1,12 +0,0 @@
-[getComputedStyle-getter-v-properties.tentative.html]
-  [margin-top]
-    expected: FAIL
-
-  [font-size]
-    expected: FAIL
-
-  [max-width]
-    expected: FAIL
-
-  [width]
-    expected: FAIL

tests/wpt/meta/css/cssom/getComputedStyle-logical-enumeration.html.ini

@@ -1,4 +0,0 @@
-[getComputedStyle-logical-enumeration.html]
-  [Logical properties in enumeration of computed style]
-    expected: FAIL
-

tests/wpt/meta/css/cssom/getComputedStyle-pseudo-with-argument.html.ini

@@ -13,3 +13,30 @@
 
   [This pseudo-element should parse: ::highlight( n\\61me )]
     expected: FAIL
+
+  [This pseudo-element should not parse: ::before(test)]
+    expected: FAIL
+
+  [This pseudo-element should not parse: ::highlight]
+    expected: FAIL
+
+  [This pseudo-element should not parse: ::highlight(]
+    expected: FAIL
+
+  [This pseudo-element should not parse: ::highlight()]
+    expected: FAIL
+
+  [This pseudo-element should not parse: ::highlight(1)]
+    expected: FAIL
+
+  [This pseudo-element should not parse: ::highlight($)]
+    expected: FAIL
+
+  [This pseudo-element should not parse: ::highlight (name)]
+    expected: FAIL
+
+  [This pseudo-element should not parse: ::highlight(name)a]
+    expected: FAIL
+
+  [This pseudo-element should not parse: ::view-transition-group(*)]
+    expected: FAIL