Make ETextModify an enum class.

third_party/WebKit/Source/core/layout/LayoutTextControl.cpp

 /**
  * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2008 Torch Mobile Inc. All rights reserved.
  *               (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 49 matching lines @@
     inner_editor_layout_object->SetStyle(CreateInnerEditorStyle(StyleRef()));
     inner_editor->SetNeedsStyleRecalc(
         kSubtreeStyleChange,
         StyleChangeReasonForTracing::Create(StyleChangeReason::kControl));
   }
   GetTextControlElement()->UpdatePlaceholderVisibility();
 }
 
 static inline void UpdateUserModifyProperty(TextControlElement& node,
                                             ComputedStyle& style) {
-  style.SetUserModify(node.IsDisabledOrReadOnly() ? READ_ONLY
-                                                  : READ_WRITE_PLAINTEXT_ONLY);
+  style.SetUserModify(node.IsDisabledOrReadOnly()
+                          ? EUserModify::kReadOnly
+                          : EUserModify::kReadWritePlaintextOnly);
 }
 
 void LayoutTextControl::AdjustInnerEditorStyle(
     ComputedStyle& text_block_style) const {
   // The inner block, if present, always has its direction set to LTR,
   // so we need to inherit the direction and unicode-bidi style from the
   // element.
   text_block_style.SetDirection(Style()->Direction());
   text_block_style.SetUnicodeBidi(Style()->GetUnicodeBidi());
 
@@ skipping 281 matching lines @@
   LayoutUnit baseline(font_data->GetFontMetrics().Ascent(kAlphabeticBaseline));
   for (LayoutObject* box = inner_editor_layout_object; box && box != this;
        box = box->Parent()) {
     if (box->IsBox())
       baseline += ToLayoutBox(box)->LogicalTop();
   }
   return baseline.ToInt();
 }
 
 }  // namespace blink