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

third_party/WebKit/Source/core/css/CSSValueIDMappings.h

Index: third_party/WebKit/Source/core/css/CSSValueIDMappings.h
diff --git a/third_party/WebKit/Source/core/css/CSSValueIDMappings.h b/third_party/WebKit/Source/core/css/CSSValueIDMappings.h
index 260e779c2bc8fc82e486da986609983035c55089..e22888af9cdf26f18c63702a2fcd3ed969b27ffb 100644
--- a/third_party/WebKit/Source/core/css/CSSValueIDMappings.h
+++ b/third_party/WebKit/Source/core/css/CSSValueIDMappings.h
@@ -43,6 +43,15 @@ inline ETextAlign CssValueIDToPlatformEnum(CSSValueID v) {
 }
 
 template <>
+inline ETextOrientation CssValueIDToPlatformEnum(CSSValueID v) {
+  if (v == CSSValueSidewaysRight)  // Legacy -webkit-auto. Eqiuvalent to start.
+    return ETextOrientation::kSideways;
+  if (v == CSSValueVerticalRight)
+    return ETextOrientation::kMixed;
+  return detail::cssValueIDToPlatformEnumGenerated<ETextOrientation>(v);
+}
+
+template <>
 inline WritingMode CssValueIDToPlatformEnum(CSSValueID v) {
   switch (v) {
     case CSSValueHorizontalTb: