style: Allow full-width and/or full-size-kana values of text-transform to be combined with a case transformation.

Differential Revision: https://phabricator.services.mozilla.com/D27402

components/style/properties/data.py

@@ -347,6 +347,7 @@ class Longhand(object):
                 "TextAlign",
                 "TextDecorationLine",
                 "TextEmphasisPosition",
+                "TextTransform",
                 "TouchAction",
                 "TransformStyle",
                 "UserSelect",

components/style/properties/longhands/inherited_text.mako.rs

@@ -19,11 +19,10 @@ ${helpers.predefined_type(
 
 // CSS Text Module Level 3
 
-// TODO(pcwalton): `full-width`
-${helpers.single_keyword(
+${helpers.predefined_type(
     "text-transform",
-    "none capitalize uppercase lowercase",
-    extra_gecko_values="full-width full-size-kana",
+    "TextTransform",
+    "computed::TextTransform::none()",
     animation_value_type="discrete",
     flags="APPLIES_TO_FIRST_LETTER APPLIES_TO_FIRST_LINE APPLIES_TO_PLACEHOLDER",
     spec="https://drafts.csswg.org/css-text/#propdef-text-transform",