ALL-IN-ONE Introduce enum class TextAffinity

Source/core/html/HTMLTextFormControlElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.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
@@ skipping 384 matching lines @@
 VisiblePosition HTMLTextFormControlElement::visiblePositionForIndex(int index) const
 {
     if (index <= 0)
         return VisiblePosition(firstPositionInNode(innerEditorElement()));
     Position start, end;
     bool selected = Range::selectNodeContents(innerEditorElement(), start, end);
     if (!selected)
         return VisiblePosition();
     CharacterIterator it(start, end);
     it.advance(index - 1);
-    return VisiblePosition(it.endPosition(), UPSTREAM);
+    return VisiblePosition(it.endPosition(), TextAffinity::Upstream);
 }
 
 int HTMLTextFormControlElement::indexForVisiblePosition(const VisiblePosition& pos) const
 {
     Position indexPosition = pos.deepEquivalent().parentAnchoredEquivalent();
     if (enclosingTextFormControl(indexPosition) != this)
         return 0;
     ASSERT(indexPosition.document());
     RefPtrWillBeRawPtr<Range> range = Range::create(*indexPosition.document());
     range->setStart(innerEditorElement(), 0, ASSERT_NO_EXCEPTION);
@@ skipping 587 matching lines @@
 }
 
 void HTMLTextFormControlElement::copyNonAttributePropertiesFromElement(const Element& source)
 {
     const HTMLTextFormControlElement& sourceElement = static_cast<const HTMLTextFormControlElement&>(source);
     m_lastChangeWasUserEdit = sourceElement.m_lastChangeWasUserEdit;
     HTMLFormControlElement::copyNonAttributePropertiesFromElement(source);
 }
 
 } // namespace blink