Make ETextModify an enum class.

third_party/WebKit/Source/core/editing/commands/ReplaceSelectionCommand.cpp

 /*
  * Copyright (C) 2005, 2006, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2009, 2010, 2011 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:
  * 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
@@ skipping 1009 matching lines @@
     return;
 
   GetDocument().UpdateStyleAndLayoutIgnorePendingStylesheets();
 
   // We can skip matching the style if the selection is plain text.
   if ((selection.Start().AnchorNode()->GetLayoutObject() &&
        selection.Start()
                .AnchorNode()
                ->GetLayoutObject()
                ->Style()
-               ->UserModify() == READ_WRITE_PLAINTEXT_ONLY) &&
+               ->UserModify() == EUserModify::kReadWritePlaintextOnly) &&
       (selection.end().AnchorNode()->GetLayoutObject() &&
        selection.end().AnchorNode()->GetLayoutObject()->Style()->UserModify() ==
-           READ_WRITE_PLAINTEXT_ONLY))
+           EUserModify::kReadWritePlaintextOnly))
     match_style_ = false;
 
   if (match_style_) {
     insertion_style_ = EditingStyle::Create(selection.Start());
     insertion_style_->MergeTypingStyle(&GetDocument());
   }
 
   const VisiblePosition visible_start = selection.VisibleStart();
   const VisiblePosition visible_end = selection.VisibleEnd();
 
@@ skipping 965 matching lines @@
   visitor->Trace(start_of_inserted_content_);
   visitor->Trace(end_of_inserted_content_);
   visitor->Trace(insertion_style_);
   visitor->Trace(document_fragment_);
   visitor->Trace(start_of_inserted_range_);
   visitor->Trace(end_of_inserted_range_);
   CompositeEditCommand::Trace(visitor);
 }
 
 }  // namespace blink