Changed EEmptyCells to an enum class and renamed its members to keywords

third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h

Index: third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
diff --git a/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h b/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
index 48ecabd483dc1aa8b4f4a6acf92289df01a77a12..33e1795472c206e786d19a1357d56f078c4c2c1a 100644
--- a/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
+++ b/third_party/WebKit/Source/core/css/CSSPrimitiveValueMappings.h
@@ -1264,10 +1264,10 @@ template<> inline CSSPrimitiveValue::CSSPrimitiveValue(EEmptyCells e)
 {
     init(UnitType::ValueID);
     switch (e) {
-    case EmptyCellsShow:
+    case EEmptyCells::Show:
         m_value.valueID = CSSValueShow;
         break;
-    case EmptyCellsHide:
+    case EEmptyCells::Hide:
         m_value.valueID = CSSValueHide;
         break;
     }
@@ -1278,15 +1278,15 @@ template<> inline EEmptyCells CSSPrimitiveValue::convertTo() const
     ASSERT(isValueID());
     switch (m_value.valueID) {
     case CSSValueShow:
-        return EmptyCellsShow;
+        return EEmptyCells::Show;
     case CSSValueHide:
-        return EmptyCellsHide;
+        return EEmptyCells::Hide;
     default:
         break;
     }
 
     ASSERT_NOT_REACHED();
-    return EmptyCellsShow;
+    return EEmptyCells::Show;
 }
 
 template<> inline CSSPrimitiveValue::CSSPrimitiveValue(EFlexDirection e)