ALL-IN-ONE Introduce enum class TextAffinity

Source/core/editing/commands/IndentOutdentCommand.cpp

 /*
  * Copyright (C) 2006, 2008 Apple 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 201 matching lines @@
         outdentParagraph();
         return;
     }
 
     Position originalSelectionEnd = endingSelection().end();
     VisiblePosition endAfterSelection = endOfParagraph(endOfLastParagraph.next());
 
     while (endOfCurrentParagraph.deepEquivalent() != endAfterSelection.deepEquivalent()) {
         VisiblePosition endOfNextParagraph = endOfParagraph(endOfCurrentParagraph.next());
         if (endOfCurrentParagraph.deepEquivalent() == endOfLastParagraph.deepEquivalent())
-            setEndingSelection(VisibleSelection(originalSelectionEnd, DOWNSTREAM));
+            setEndingSelection(VisibleSelection(originalSelectionEnd, TextAffinity::Downstream));
         else
             setEndingSelection(endOfCurrentParagraph);
 
         outdentParagraph();
 
         // outdentParagraph could move more than one paragraph if the paragraph
         // is in a list item. As a result, endAfterSelection and endOfNextParagraph
         // could refer to positions no longer in the document.
         if (endAfterSelection.isNotNull() && !endAfterSelection.deepEquivalent().inDocument())
             break;
@@ skipping 16 matching lines @@
 
 void IndentOutdentCommand::formatRange(const Position& start, const Position& end, const Position&, RefPtrWillBeRawPtr<HTMLElement>& blockquoteForNextIndent)
 {
     if (tryIndentingAsListItem(start, end))
         blockquoteForNextIndent = nullptr;
     else
         indentIntoBlockquote(start, end, blockquoteForNextIndent);
 }
 
 }