Make TextDecoration an enum class.

third_party/WebKit/Source/core/paint/TextPainterBase.cpp

 // Copyright 2014 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 "core/paint/TextPainterBase.h"
 
 #include "core/dom/Document.h"
 #include "core/paint/AppliedDecorationPainter.h"
 #include "core/paint/BoxPainter.h"
 #include "core/paint/PaintInfo.h"
@@ skipping 157 matching lines @@
 
 void TextPainterBase::PaintDecorationsOnlyLineThrough(
     const DecorationInfo& decoration_info,
     const PaintInfo& paint_info,
     const Vector<AppliedTextDecoration>& decorations) {
   GraphicsContext& context = paint_info.context;
   GraphicsContextStateSaver state_saver(context);
   context.SetStrokeThickness(decoration_info.thickness);
   for (const AppliedTextDecoration& decoration : decorations) {
     TextDecoration lines = decoration.Lines();
-    if (lines & kTextDecorationLineThrough) {
+    if (EnumHasFlags(lines, TextDecoration::kLineThrough)) {
       const float line_through_offset = 2 * decoration_info.baseline / 3;
       AppliedDecorationPainter decoration_painter(
           context, decoration_info, line_through_offset, decoration,
           decoration_info.double_offset, 0);
       // No skip: ink for line-through,
       // compare https://github.com/w3c/csswg-drafts/issues/711
       decoration_painter.Paint();
     }
   }
 }
@@ skipping 100 matching lines @@
       decoration_info.thickness = ComputeDecorationThickness(
           decoration_info.style, decoration_info.font_data);
     }
   }
 
   // Offset between lines - always non-zero, so lines never cross each other.
   decoration_info.double_offset = decoration_info.thickness + 1.f;
 }
 
 }  // namespace blink