Changed ComputedStyle's EVisibility to be an enum class and fixed naming

third_party/WebKit/Source/core/style/ComputedStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 648 matching lines @@
                 || (borderLeftStyle() == BorderStyleNone && other.borderLeftStyle() == BorderStyleHidden)
                 || (borderRightStyle() == BorderStyleHidden && other.borderRightStyle() == BorderStyleNone)
                 || (borderRightStyle() == BorderStyleNone && other.borderRightStyle() == BorderStyleHidden)))
             return true;
     } else if (m_nonInheritedData.m_effectiveDisplay == LIST_ITEM) {
         if (m_inheritedData.m_listStyleType != other.m_inheritedData.m_listStyleType
             || m_inheritedData.m_listStylePosition != other.m_inheritedData.m_listStylePosition)
             return true;
     }
 
-    if ((visibility() == COLLAPSE) != (other.visibility() == COLLAPSE))
+    if ((visibility() == EVisibility::Collapse) != (other.visibility() == EVisibility::Collapse))
         return true;
 
     if (hasPseudoStyle(PseudoIdScrollbar) != other.hasPseudoStyle(PseudoIdScrollbar))
         return true;
 
     // Movement of non-static-positioned object is special cased in ComputedStyle::visualInvalidationDiff().
 
     return false;
 }
 
@@ skipping 1278 matching lines @@
         if (value < 0)
             fvalue -= 0.5f;
         else
             fvalue += 0.5f;
     }
 
     return roundForImpreciseConversion<int>(fvalue / zoomFactor);
 }
 
 } // namespace blink