Make TextCombine 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 100 matching lines @@
   kSub,
   kSuper,
   kTextTop,
   kTextBottom,
   kTop,
   kBottom,
   kBaselineMiddle,
   kLength
 };
 
-enum TextCombine { kTextCombineNone, kTextCombineAll };
+enum class TextCombine { kNone, kAll };
 
 enum EFillAttachment {
   kScrollBackgroundAttachment,
   kLocalBackgroundAttachment,
   kFixedBackgroundAttachment
 };
 
 enum EFillBox {
   kBorderFillBox,
   kPaddingFillBox,
@@ skipping 292 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