Make EUserSelect 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 1404 matching lines @@
   }
 
   NOTREACHED();
   return EUserModify::kReadOnly;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EUserSelect e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
-    case SELECT_NONE:
+    case EUserSelect::kNone:
       value_id_ = CSSValueNone;
       break;
-    case SELECT_TEXT:
+    case EUserSelect::kText:
       value_id_ = CSSValueText;
       break;
-    case SELECT_ALL:
+    case EUserSelect::kAll:
       value_id_ = CSSValueAll;
       break;
   }
 }
 
 template <>
 inline EUserSelect CSSIdentifierValue::ConvertTo() const {
   switch (value_id_) {
     case CSSValueAuto:
-      return SELECT_TEXT;
+      return EUserSelect::kText;
     case CSSValueNone:
-      return SELECT_NONE;
+      return EUserSelect::kNone;
     case CSSValueText:
-      return SELECT_TEXT;
+      return EUserSelect::kText;
     case CSSValueAll:
-      return SELECT_ALL;
+      return EUserSelect::kAll;
     default:
       break;
   }
 
   NOTREACHED();
-  return SELECT_TEXT;
+  return EUserSelect::kText;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EVerticalAlign a)
     : CSSValue(kIdentifierClass) {
   switch (a) {
     case EVerticalAlign::kTop:
       value_id_ = CSSValueTop;
       break;
     case EVerticalAlign::kBottom:
@@ skipping 1893 matching lines @@
     default:
       break;
   }
   NOTREACHED();
   return kContainsNone;
 }
 
 }  // namespace blink
 
 #endif