Make Hyphens 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 859 matching lines @@
   }
 
   NOTREACHED();
   return EFloat::kNone;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(Hyphens e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
-    case kHyphensAuto:
+    case Hyphens::kAuto:
       value_id_ = CSSValueAuto;
       break;
-    case kHyphensManual:
+    case Hyphens::kManual:
       value_id_ = CSSValueManual;
       break;
-    case kHyphensNone:
+    case Hyphens::kNone:
       value_id_ = CSSValueNone;
       break;
   }
 }
 
 template <>
 inline Hyphens CSSIdentifierValue::ConvertTo() const {
   switch (value_id_) {
     case CSSValueAuto:
-      return kHyphensAuto;
+      return Hyphens::kAuto;
     case CSSValueManual:
-      return kHyphensManual;
+      return Hyphens::kManual;
     case CSSValueNone:
-      return kHyphensNone;
+      return Hyphens::kNone;
     default:
       break;
   }
 
   NOTREACHED();
-  return kHyphensManual;
+  return Hyphens::kManual;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(LineBreak e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
     case LineBreak::kAuto:
       value_id_ = CSSValueAuto;
       break;
     case LineBreak::kLoose:
@@ skipping 2403 matching lines @@
     default:
       break;
   }
   NOTREACHED();
   return kContainsNone;
 }
 
 }  // namespace blink
 
 #endif