Make EFlexDirection 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 755 matching lines @@
   }
 
   NOTREACHED();
   return HORIZONTAL;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EFlexDirection e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
-    case kFlowRow:
+    case EFlexDirection::kRow:
       value_id_ = CSSValueRow;
       break;
-    case kFlowRowReverse:
+    case EFlexDirection::kRowReverse:
       value_id_ = CSSValueRowReverse;
       break;
-    case kFlowColumn:
+    case EFlexDirection::kColumn:
       value_id_ = CSSValueColumn;
       break;
-    case kFlowColumnReverse:
+    case EFlexDirection::kColumnReverse:
       value_id_ = CSSValueColumnReverse;
       break;
   }
 }
 
 template <>
 inline EFlexDirection CSSIdentifierValue::ConvertTo() const {
   switch (value_id_) {
     case CSSValueRow:
-      return kFlowRow;
+      return EFlexDirection::kRow;
     case CSSValueRowReverse:
-      return kFlowRowReverse;
+      return EFlexDirection::kRowReverse;
     case CSSValueColumn:
-      return kFlowColumn;
+      return EFlexDirection::kColumn;
     case CSSValueColumnReverse:
-      return kFlowColumnReverse;
+      return EFlexDirection::kColumnReverse;
     default:
       break;
   }
 
   NOTREACHED();
-  return kFlowRow;
+  return EFlexDirection::kRow;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EFlexWrap e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
     case kFlexNoWrap:
       value_id_ = CSSValueNowrap;
       break;
     case kFlexWrap:
@@ skipping 1806 matching lines @@
     default:
       break;
   }
   NOTREACHED();
   return kContainsNone;
 }
 
 }  // namespace blink
 
 #endif