ALL-IN-ONE Introduce enum class TextAffinity

Source/core/editing/DOMSelection.cpp

 /*
  * Copyright (C) 2007, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2012 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.
@@ skipping 200 matching lines @@
 
     if (!isValidForPosition(node))
         return;
     RefPtrWillBeRawPtr<Range> range = Range::create(node->document());
     range->setStart(node, offset, exceptionState);
     if (exceptionState.hadException())
         return;
     range->setEnd(node, offset, exceptionState);
     if (exceptionState.hadException())
         return;
-    m_frame->selection().setSelectedRange(range.get(), DOWNSTREAM, m_frame->selection().isDirectional() ? FrameSelection::Directional : FrameSelection::NonDirectional);
+    m_frame->selection().setSelectedRange(range.get(), TextAffinity::Downstream, m_frame->selection().isDirectional() ? FrameSelection::Directional : FrameSelection::NonDirectional);
 }
 
 void DOMSelection::collapseToEnd(ExceptionState& exceptionState)
 {
     if (!m_frame)
         return;
 
     const VisibleSelection& selection = m_frame->selection().selection();
 
     if (selection.isNone()) {
@@ skipping 192 matching lines @@
     }
 
     // FIXME: "Merge the ranges if they intersect" is Blink-specific behavior; other browsers supporting discontiguous
     // selection (obviously) keep each Range added and return it in getRangeAt(). But it's unclear if we can really
     // do the same, since we don't support discontiguous selection. Further discussions at
     // <https://code.google.com/p/chromium/issues/detail?id=353069>.
 
     Range* start = originalRange->compareBoundaryPoints(Range::START_TO_START, newRange, ASSERT_NO_EXCEPTION) < 0 ? originalRange.get() : newRange;
     Range* end = originalRange->compareBoundaryPoints(Range::END_TO_END, newRange, ASSERT_NO_EXCEPTION) < 0 ? newRange : originalRange.get();
     RefPtrWillBeRawPtr<Range> merged = Range::create(originalRange->startContainer()->document(), start->startContainer(), start->startOffset(), end->endContainer(), end->endOffset());
-    EAffinity affinity = selection.selection().affinity();
+    TextAffinity affinity = selection.selection().affinity();
     selection.setSelectedRange(merged.get(), affinity);
 }
 
 void DOMSelection::deleteFromDocument()
 {
     if (!m_frame)
         return;
 
     FrameSelection& selection = m_frame->selection();
 
@@ skipping 111 matching lines @@
         m_treeScope->document().addConsoleMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, message));
 }
 
 DEFINE_TRACE(DOMSelection)
 {
     visitor->trace(m_treeScope);
     DOMWindowProperty::trace(visitor);
 }
 
 } // namespace blink