Make EBorderStyle an enum class.

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

Index: third_party/WebKit/Source/core/paint/TableCellPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/TableCellPainter.cpp b/third_party/WebKit/Source/core/paint/TableCellPainter.cpp
index 888b8df3d74e762e4ed6466e4c6d751bce594c76..8895497d1af5330fc9a39ba8e554aea250ab3bc7 100644
--- a/third_party/WebKit/Source/core/paint/TableCellPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/TableCellPainter.cpp
@@ -63,10 +63,10 @@ void TableCellPainter::Paint(const PaintInfo& paint_info,
 }
 
 static EBorderStyle CollapsedBorderStyle(EBorderStyle style) {
-  if (style == kBorderStyleOutset)
-    return kBorderStyleGroove;
-  if (style == kBorderStyleInset)
-    return kBorderStyleRidge;
+  if (style == EBorderStyle::kOutset)
+    return EBorderStyle::kGroove;
+  if (style == EBorderStyle::kInset)
+    return EBorderStyle::kRidge;
   return style;
 }