Make EFlexDirection 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 139 matching lines @@
 
 // Deprecated Flexible Box Properties
 
 enum EBoxPack { kBoxPackStart, kBoxPackCenter, kBoxPackEnd, kBoxPackJustify };
 enum EBoxAlignment { BSTRETCH, BSTART, BCENTER, BEND, BBASELINE };
 enum EBoxOrient { HORIZONTAL, VERTICAL };
 enum EBoxLines { SINGLE, MULTIPLE };
 
 // CSS3 Flexbox Properties
 
-enum EFlexDirection {
-  kFlowRow,
-  kFlowRowReverse,
-  kFlowColumn,
-  kFlowColumnReverse
-};
+enum class EFlexDirection { kRow, kRowReverse, kColumn, kColumnReverse };
 enum EFlexWrap { kFlexNoWrap, kFlexWrap, kFlexWrapReverse };
 
 // CSS3 Image Values
 enum class EResize { kNone, kBoth, kHorizontal, kVertical };
 
 enum QuoteType { OPEN_QUOTE, CLOSE_QUOTE, NO_OPEN_QUOTE, NO_CLOSE_QUOTE };
 
 enum EAnimPlayState { kAnimPlayStatePlaying, kAnimPlayStatePaused };
 
 static const size_t kTextDecorationBits = 4;
@@ skipping 183 matching lines @@
 enum class PageSizeType {
   kAuto,       // size: auto
   kLandscape,  // size: landscape
   kPortrait,   // size: portrait
   kResolved    // Size is fully resolved.
 };
 
 }  // namespace blink
 
 #endif  // ComputedStyleConstants_h