Make EUserSelect an enum class.

third_party/WebKit/Source/core/frame/SmartClip.cpp

 /*
  * Copyright (C) 2013 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 225 matching lines @@
   }
 }
 
 String SmartClip::ExtractTextFromNode(Node* node) {
   // Science has proven that no text nodes are ever positioned at y == -99999.
   int prev_y_pos = -99999;
 
   StringBuilder result;
   for (Node& current_node : NodeTraversal::InclusiveDescendantsOf(*node)) {
     const ComputedStyle* style = current_node.EnsureComputedStyle();
-    if (style && style->UserSelect() == SELECT_NONE)
+    if (style && style->UserSelect() == EUserSelect::kNone)
       continue;
 
     if (Node* node_from_frame = NodeInsideFrame(&current_node))
       result.Append(ExtractTextFromNode(node_from_frame));
 
     IntRect node_rect = current_node.PixelSnappedBoundingBox();
     if (current_node.GetLayoutObject() && !node_rect.IsEmpty()) {
       if (current_node.IsTextNode()) {
         String node_value = current_node.nodeValue();
 
         // It's unclear why we blacklist solitary "\n" node values.
         // Maybe we're trying to ignore <br> tags somehow?
         if (node_value == "\n")
           node_value = "";
 
         if (node_rect.Y() != prev_y_pos) {
           prev_y_pos = node_rect.Y();
           result.Append('\n');
         }
 
         result.Append(node_value);
       }
     }
   }
 
   return result.ToString();
 }
 
 }  // namespace blink