ALL-IN-ONE Introduce enum class TextAffinity

Source/core/editing/VisibleUnitsTest.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 #include "core/editing/VisibleUnits.h"
 
 #include "core/editing/EditingTestBase.h"
 #include "core/editing/VisiblePosition.h"
 
 namespace blink {
 
 namespace {
 
-PositionWithAffinity positionWithAffinityInDOMTree(Node& anchor, int offset, EAffinity affinity = DOWNSTREAM)
+PositionWithAffinity positionWithAffinityInDOMTree(Node& anchor, int offset, TextAffinity affinity = TextAffinity::Downstream)
 {
     return PositionWithAffinity(canonicalPositionOf(Position(&anchor, offset)), affinity);
 }
 
-PositionInComposedTreeWithAffinity positionWithAffinityInComposedTree(Node& anchor, int offset, EAffinity affinity = DOWNSTREAM)
+PositionInComposedTreeWithAffinity positionWithAffinityInComposedTree(Node& anchor, int offset, TextAffinity affinity = TextAffinity::Downstream)
 {
     return PositionInComposedTreeWithAffinity(canonicalPositionOf(PositionInComposedTree(&anchor, offset)), affinity);
 }
 
 } // namespace
 
 class VisibleUnitsTest : public EditingTestBase {
 };
 
 TEST_F(VisibleUnitsTest, inSameLine)
@@ skipping 38 matching lines @@
     setBodyContent(bodyContent);
     updateLayoutAndStyleForPainting();
     RefPtrWillBeRawPtr<Element> sample1 = document().getElementById("sample1");
     RefPtrWillBeRawPtr<Element> sample2 = document().getElementById("sample2");
 
     EXPECT_FALSE(rendersInDifferentPosition(Position::afterNode(sample1->firstChild()), Position(sample2->firstChild(), 0)));
     EXPECT_FALSE(rendersInDifferentPosition(Position::lastPositionInNode(sample1->firstChild()), Position(sample2->firstChild(), 0)));
 }
 
 } // namespace blink