Make TextOrientation an enum class.

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

 /*
  * Copyright (C) 2007 Alexey Proskuryakov <ap@nypop.com>.
  * Copyright (C) 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2009 Jeff Schiller <codedread@gmail.com>
  * Copyright (C) Research In Motion Limited 2010. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ skipping 1621 matching lines @@
   }
 
   NOTREACHED();
   return TextEmphasisMark::kNone;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(TextOrientation e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
-    case kTextOrientationSideways:
+    case TextOrientation::kSideways:
       value_id_ = CSSValueSideways;
       break;
-    case kTextOrientationMixed:
+    case TextOrientation::kMixed:
       value_id_ = CSSValueMixed;
       break;
-    case kTextOrientationUpright:
+    case TextOrientation::kUpright:
       value_id_ = CSSValueUpright;
       break;
   }
 }
 
 template <>
 inline TextOrientation CSSIdentifierValue::ConvertTo() const {
   switch (value_id_) {
     case CSSValueSideways:
     case CSSValueSidewaysRight:
-      return kTextOrientationSideways;
+      return TextOrientation::kSideways;
     case CSSValueMixed:
     case CSSValueVerticalRight:  // -webkit-text-orientation
-      return kTextOrientationMixed;
+      return TextOrientation::kMixed;
     case CSSValueUpright:
-      return kTextOrientationUpright;
+      return TextOrientation::kUpright;
     default:
       break;
   }
 
   NOTREACHED();
-  return kTextOrientationMixed;
+  return TextOrientation::kMixed;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(FontDescription::Kerning kerning)
     : CSSValue(kIdentifierClass) {
   switch (kerning) {
     case FontDescription::kAutoKerning:
       value_id_ = CSSValueAuto;
       return;
     case FontDescription::kNormalKerning:
@@ skipping 1487 matching lines @@
     default:
       break;
   }
   NOTREACHED();
   return kContainsNone;
 }
 
 }  // namespace blink
 
 #endif