Make EWordBreak 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 1467 matching lines @@
   }
 
   NOTREACHED();
   return EVerticalAlign::kTop;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EWordBreak e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
-    case kNormalWordBreak:
+    case EWordBreak::kNormal:
       value_id_ = CSSValueNormal;
       break;
-    case kBreakAllWordBreak:
+    case EWordBreak::kBreakAll:
       value_id_ = CSSValueBreakAll;
       break;
-    case kBreakWordBreak:
+    case EWordBreak::kBreakWord:
       value_id_ = CSSValueBreakWord;
       break;
-    case kKeepAllWordBreak:
+    case EWordBreak::kKeepAll:
       value_id_ = CSSValueKeepAll;
       break;
   }
 }
 
 template <>
 inline EWordBreak CSSIdentifierValue::ConvertTo() const {
   switch (value_id_) {
     case CSSValueBreakAll:
-      return kBreakAllWordBreak;
+      return EWordBreak::kBreakAll;
     case CSSValueBreakWord:
-      return kBreakWordBreak;
+      return EWordBreak::kBreakWord;
     case CSSValueNormal:
-      return kNormalWordBreak;
+      return EWordBreak::kNormal;
     case CSSValueKeepAll:
-      return kKeepAllWordBreak;
+      return EWordBreak::kKeepAll;
     default:
       break;
   }
 
   NOTREACHED();
-  return kNormalWordBreak;
+  return EWordBreak::kNormal;
 }
 
 template <>
 inline CSSIdentifierValue::CSSIdentifierValue(EOverflowWrap e)
     : CSSValue(kIdentifierClass) {
   switch (e) {
     case EOverflowWrap::kNormal:
       value_id_ = CSSValueNormal;
       break;
     case EOverflowWrap::kBreakWord:
@@ skipping 1790 matching lines @@
     default:
       break;
   }
   NOTREACHED();
   return kContainsNone;
 }
 
 }  // namespace blink
 
 #endif