Make ETextModify an enum class.

third_party/WebKit/Source/core/editing/EditingUtilities.cpp

Index: third_party/WebKit/Source/core/editing/EditingUtilities.cpp
diff --git a/third_party/WebKit/Source/core/editing/EditingUtilities.cpp b/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
index aae9e7b3cf42f556772fde78b23bed945e8dc739..72d667e651c7778f25c0c04a5c836b8b6a132737 100644
--- a/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
+++ b/third_party/WebKit/Source/core/editing/EditingUtilities.cpp
@@ -332,11 +332,11 @@ static bool HasEditableLevel(const Node& node, EditableLevel editable_level) {
     if ((ancestor.IsHTMLElement() || ancestor.IsDocumentNode()) &&
         ancestor.GetLayoutObject()) {
       switch (ancestor.GetLayoutObject()->Style()->UserModify()) {
-        case READ_ONLY:
+        case EUserModify::kReadOnly:
           return false;
-        case READ_WRITE:
+        case EUserModify::kReadWrite:
           return true;
-        case READ_WRITE_PLAINTEXT_ONLY:
+        case EUserModify::kReadWritePlaintextOnly:
           return editable_level != kRichlyEditable;
       }
       NOTREACHED();
@@ -985,7 +985,7 @@ EUserSelect UsedValueOfUserSelect(const Node& node) {
     return SELECT_NONE;
 
   const ComputedStyle* style = node.GetLayoutObject()->Style();
-  if (style->UserModify() != READ_ONLY)
+  if (style->UserModify() != EUserModify::kReadOnly)
     return SELECT_TEXT;
 
   return style->UserSelect();