Make EUserSelect an enum class.

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

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 962 matching lines @@
 
   for (Node& runner : NodeTraversal::AncestorsOf(node)) {
     if (IsBlockFlowElement(runner) || isHTMLBodyElement(runner))
       return ToElement(&runner);
   }
   return nullptr;
 }
 
 EUserSelect UsedValueOfUserSelect(const Node& node) {
   if (node.IsHTMLElement() && ToHTMLElement(node).IsTextControl())
-    return SELECT_TEXT;
+    return EUserSelect::kText;
   if (!node.GetLayoutObject())
-    return SELECT_NONE;
+    return EUserSelect::kNone;
 
   const ComputedStyle* style = node.GetLayoutObject()->Style();
   if (style->UserModify() != EUserModify::kReadOnly)
-    return SELECT_TEXT;
+    return EUserSelect::kText;
 
   return style->UserSelect();
 }
 
 template <typename Strategy>
 TextDirection DirectionOfEnclosingBlockAlgorithm(
     const PositionTemplate<Strategy>& position) {
   Element* enclosing_block_element =
       EnclosingBlock(PositionTemplate<Strategy>::FirstPositionInOrBeforeNode(
                          position.ComputeContainerNode()),
@@ skipping 1205 matching lines @@
         return InputType::kDeleteSoftLineBackward;
       if (granularity == kParagraphBoundary)
         return InputType::kDeleteHardLineBackward;
       return InputType::kDeleteContentBackward;
     default:
       return InputType::kNone;
   }
 }
 
 }  // namespace blink