Make RubyPosition an enum class.

third_party/WebKit/Source/core/layout/LayoutRubyRun.cpp

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 218 matching lines @@
   LayoutUnit last_line_ruby_text_bottom = rt->LogicalHeight();
   LayoutUnit first_line_ruby_text_top;
   RootInlineBox* root_box = rt->LastRootBox();
   if (root_box) {
     // In order to align, we have to ignore negative leading.
     first_line_ruby_text_top = rt->FirstRootBox()->LogicalTopLayoutOverflow();
     last_line_ruby_text_bottom = root_box->LogicalBottomLayoutOverflow();
   }
 
   if (Style()->IsFlippedLinesWritingMode() ==
-      (Style()->GetRubyPosition() == kRubyPositionAfter)) {
+      (Style()->GetRubyPosition() == RubyPosition::kAfter)) {
     LayoutUnit first_line_top;
     if (LayoutRubyBase* rb = RubyBase()) {
       RootInlineBox* root_box = rb->FirstRootBox();
       if (root_box)
         first_line_top = root_box->LogicalTopLayoutOverflow();
       first_line_top += rb->LogicalTop();
     }
 
     rt->SetLogicalTop(-last_line_ruby_text_bottom + first_line_top);
   } else {
@@ skipping 95 matching lines @@
     case U_LB_GLUE:
     case U_LB_OPEN_PUNCTUATION:
       return false;
     default:
       break;
   }
   return true;
 }
 
 }  // namespace blink