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

third_party/WebKit/Source/core/animation/animatable/AnimatableVisibility.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 18 matching lines @@
  */
 
 #include "core/animation/animatable/AnimatableVisibility.h"
 
 namespace blink {
 
 bool AnimatableVisibility::usesDefaultInterpolationWith(const AnimatableValue* value) const
 {
     EVisibility from = m_visibility;
     EVisibility to = toAnimatableVisibility(value)->m_visibility;
-    return from != VISIBLE && to != VISIBLE;
+    return from != EVisibility::Visible && to != EVisibility::Visible;
 }
 
 PassRefPtr<AnimatableValue> AnimatableVisibility::interpolateTo(const AnimatableValue* value, double fraction) const
 {
     EVisibility from = m_visibility;
     EVisibility to = toAnimatableVisibility(value)->m_visibility;
-    if (from != VISIBLE && to != VISIBLE)
+    if (from != EVisibility::Visible && to != EVisibility::Visible)
         return defaultInterpolateTo(this, value, fraction);
     if (fraction <= 0)
         return takeConstRef(this);
     if (fraction >= 1)
         return takeConstRef(value);
-    return takeConstRef(from == VISIBLE ? this : value);
+    return takeConstRef(from == EVisibility::Visible ? this : value);
 }
 
 bool AnimatableVisibility::equalTo(const AnimatableValue* value) const
 {
     return m_visibility == toAnimatableVisibility(value)->m_visibility;
 }
 
 } // namespace blink