Make TextDecorationSkip 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 220 matching lines @@
 
 enum TextDecorationStyle {
   kTextDecorationStyleSolid,
   kTextDecorationStyleDouble,
   kTextDecorationStyleDotted,
   kTextDecorationStyleDashed,
   kTextDecorationStyleWavy
 };
 
 static const size_t kTextDecorationSkipBits = 3;
-enum TextDecorationSkip {
-  kTextDecorationSkipNone = 0x0,
-  kTextDecorationSkipObjects = 0x1,
-  kTextDecorationSkipInk = 0x2
-};
+enum class TextDecorationSkip { kNone = 0x0, kObjects = 0x1, kInk = 0x2 };
+inline TextDecorationSkip operator&(TextDecorationSkip a,
+                                    TextDecorationSkip b) {
+  return TextDecorationSkip(static_cast<unsigned>(a) &
+                            static_cast<unsigned>(b));
+}
 inline TextDecorationSkip operator|(TextDecorationSkip a,
                                     TextDecorationSkip b) {
   return TextDecorationSkip(static_cast<unsigned>(a) |
                             static_cast<unsigned>(b));
 }
 inline TextDecorationSkip& operator|=(TextDecorationSkip& a,
                                       TextDecorationSkip b) {
   return a = a | b;
 }
 
@@ skipping 195 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