Make EBorderStyle an enum class.

third_party/WebKit/Source/core/style/ComputedStyleConstants.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights
  * reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  * Copyright (C) 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  *
@@ skipping 80 matching lines @@
                          (1 << (kPseudoIdBackdrop - kFirstPublicPseudoId))
 };
 
 enum ColumnFill { kColumnFillBalance, kColumnFillAuto };
 
 enum ColumnSpan { kColumnSpanNone = 0, kColumnSpanAll };
 
 // These have been defined in the order of their precedence for
 // border-collapsing. Do not change this order! This order also must match the
 // order in CSSValueKeywords.in.
-enum EBorderStyle {
-  kBorderStyleNone,
-  kBorderStyleHidden,
-  kBorderStyleInset,
-  kBorderStyleGroove,
-  kBorderStyleOutset,
-  kBorderStyleRidge,
-  kBorderStyleDotted,
-  kBorderStyleDashed,
-  kBorderStyleSolid,
-  kBorderStyleDouble
+enum class EBorderStyle {
+  kNone,
+  kHidden,
+  kInset,
+  kGroove,
+  kOutset,
+  kRidge,
+  kDotted,
+  kDashed,
+  kSolid,
+  kDouble
 };
 
 enum OutlineIsAuto { kOutlineIsAutoOff = 0, kOutlineIsAutoOn };
 
 enum EMarginCollapse {
   kMarginCollapseCollapse,
   kMarginCollapseSeparate,
   kMarginCollapseDiscard
 };
 
@@ skipping 352 matching lines @@
 // fraction, which leaves 20 bits for the integer part, making 1048575
 // the largest number.
 
 static const int kBorderWidthFractionalBits = 6;
 static const int kBorderWidthDenominator = 1 << kBorderWidthFractionalBits;
 static const int kMaxForBorderWidth = ((1 << 26) - 1) / kBorderWidthDenominator;
 
 }  // namespace blink
 
 #endif  // ComputedStyleConstants_h