ALL-IN-ONE Introduce enum class TextAffinity

Source/core/editing/commands/EditorCommand.cpp

Index: Source/core/editing/commands/EditorCommand.cpp
diff --git a/Source/core/editing/commands/EditorCommand.cpp b/Source/core/editing/commands/EditorCommand.cpp
index 72808fd31595b85de24e661ade71cbff5f1e4c56..546c0dabfb9d5008efae0e4428648de28f9ba2ae 100644
--- a/Source/core/editing/commands/EditorCommand.cpp
+++ b/Source/core/editing/commands/EditorCommand.cpp
@@ -220,7 +220,7 @@ static bool expandSelectionToGranularity(LocalFrame& frame, TextGranularity gran
         return false;
     if (newRange.isCollapsed())
         return false;
-    EAffinity affinity = frame.selection().affinity();
+    TextAffinity affinity = frame.selection().affinity();
     frame.selection().setSelectedRange(newRange, affinity, FrameSelection::NonDirectional, FrameSelection::CloseTyping);
     return true;
 }
@@ -398,7 +398,7 @@ static bool executeDeleteToMark(LocalFrame& frame, Event*, EditorCommandSource,
     // |VisibleSelection::toNormalizedRange()|.
     RefPtrWillBeRawPtr<Range> mark = frame.editor().mark().toNormalizedRange();
     if (mark) {
-        bool selected = frame.selection().setSelectedRange(unionEphemeralRanges(EphemeralRange(mark.get()), frame.editor().selectedRange()), DOWNSTREAM, FrameSelection::NonDirectional, FrameSelection::CloseTyping);
+        bool selected = frame.selection().setSelectedRange(unionEphemeralRanges(EphemeralRange(mark.get()), frame.editor().selectedRange()), TextAffinity::Downstream, FrameSelection::NonDirectional, FrameSelection::CloseTyping);
         ASSERT(selected);
         if (!selected)
             return false;
@@ -1048,7 +1048,7 @@ static bool executeSelectToMark(LocalFrame& frame, Event*, EditorCommandSource,
     EphemeralRange selection = frame.editor().selectedRange();
     if (!mark || selection.isNull())
         return false;
-    frame.selection().setSelectedRange(unionEphemeralRanges(EphemeralRange(mark.get()), selection), DOWNSTREAM, FrameSelection::NonDirectional, FrameSelection::CloseTyping);
+    frame.selection().setSelectedRange(unionEphemeralRanges(EphemeralRange(mark.get()), selection), TextAffinity::Downstream, FrameSelection::NonDirectional, FrameSelection::CloseTyping);
     return true;
 }