ALL-IN-ONE Introduce enum class TextAffinity

Source/core/editing/commands/DeleteSelectionCommand.cpp

 /*
  * Copyright (C) 2005 Apple Computer, 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 774 matching lines @@
 {
     // If selection has not been set to a custom selection when the command was created,
     // use the current ending selection.
     if (!m_hasSelectionToDelete)
         m_selectionToDelete = endingSelection();
 
     if (!m_selectionToDelete.isNonOrphanedRange() || !m_selectionToDelete.isContentEditable())
         return;
 
     // save this to later make the selection with
-    EAffinity affinity = m_selectionToDelete.affinity();
+    TextAffinity affinity = m_selectionToDelete.affinity();
 
     Position downstreamEnd = m_selectionToDelete.end().downstream();
     bool rootWillStayOpenWithoutPlaceholder = downstreamEnd.computeContainerNode() == downstreamEnd.computeContainerNode()->rootEditableElement()
         || (downstreamEnd.computeContainerNode()->isTextNode() && downstreamEnd.computeContainerNode()->parentNode() == downstreamEnd.computeContainerNode()->rootEditableElement());
     bool lineBreakAtEndOfSelectionToDelete = lineBreakExistsAtVisiblePosition(m_selectionToDelete.visibleEnd());
     m_needPlaceholder = !rootWillStayOpenWithoutPlaceholder
         && isStartOfParagraph(m_selectionToDelete.visibleStart(), CanCrossEditingBoundary)
         && isEndOfParagraph(m_selectionToDelete.visibleEnd(), CanCrossEditingBoundary)
         && !lineBreakAtEndOfSelectionToDelete;
     if (m_needPlaceholder) {
@@ skipping 93 matching lines @@
     visitor->trace(m_deleteIntoBlockquoteStyle);
     visitor->trace(m_startRoot);
     visitor->trace(m_endRoot);
     visitor->trace(m_startTableRow);
     visitor->trace(m_endTableRow);
     visitor->trace(m_temporaryPlaceholder);
     CompositeEditCommand::trace(visitor);
 }
 
 } // namespace blink