Generate enum/getters/setters/mappings for text-orientation.

third_party/WebKit/Source/core/css/CSSProperties.json5

Index: third_party/WebKit/Source/core/css/CSSProperties.json5
diff --git a/third_party/WebKit/Source/core/css/CSSProperties.json5 b/third_party/WebKit/Source/core/css/CSSProperties.json5
index 5237c96a31edf915e6df035c31caf0720b938761..d82f5d6828f716a22548f4ed049d8c45084876e5 100644
--- a/third_party/WebKit/Source/core/css/CSSProperties.json5
+++ b/third_party/WebKit/Source/core/css/CSSProperties.json5
@@ -522,11 +522,12 @@
       custom_value: true,
       inherited: true,
       priority: "High",
-      field_template: "storage_only",
-      type_name: "TextOrientation",
-      default_value: "TextOrientation::kMixed",
+      field_template: "keyword",
+      keywords: ["sideways", "mixed", "upright"],
+      default_value: "mixed",
       field_size: 2,
       field_group: "rare-inherited",
+      getter: "GetTextOrientation"
     },
     {
       name: "-webkit-text-orientation",