Make ETextModify 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 1427 matching lines @@
   }
 
   NOTREACHED();
   return DRAG_AUTO;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EUserModify e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
-    case READ_ONLY:
+    case EUserModify::kReadOnly:
       value_id_ = CSSValueReadOnly;
       break;
-    case READ_WRITE:
+    case EUserModify::kReadWrite:
       value_id_ = CSSValueReadWrite;
       break;
-    case READ_WRITE_PLAINTEXT_ONLY:
+    case EUserModify::kReadWritePlaintextOnly:
       value_id_ = CSSValueReadWritePlaintextOnly;
       break;
   }
 }
 
 template <>
 inline EUserModify CSSIdentifierValue::ConvertTo() const {
   switch (value_id_) {
     case CSSValueReadOnly:
-      return READ_ONLY;
+      return EUserModify::kReadOnly;
     case CSSValueReadWrite:
-      return READ_WRITE;
+      return EUserModify::kReadWrite;
     case CSSValueReadWritePlaintextOnly:
-      return READ_WRITE_PLAINTEXT_ONLY;
+      return EUserModify::kReadWritePlaintextOnly;
     default:
       break;
   }
 
   NOTREACHED();
-  return READ_ONLY;
+  return EUserModify::kReadOnly;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EUserSelect e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
     case SELECT_NONE:
       value_id_ = CSSValueNone;
       break;
     case SELECT_TEXT:
@@ skipping 1928 matching lines @@
     default:
       break;
   }
   NOTREACHED();
   return kContainsNone;
 }
 
 }  // namespace blink
 
 #endif