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

third_party/WebKit/Source/modules/plugins/PluginOcclusionSupport.cpp

 /*
  * Copyright (C) 2011 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 97 matching lines @@
             ASSERT(false); // We should have seen ro1 and ro2 by now.
             return false;
         }
     }
     return true;
 }
 
 static bool intersectsRect(const LayoutObject* renderer, const IntRect& rect)
 {
     return renderer->absoluteBoundingBoxRectIgnoringTransforms().intersects(rect)
-        && (!renderer->style() || renderer->style()->visibility() == VISIBLE);
+        && (!renderer->style() || renderer->style()->visibility() == EVisibility::Visible);
 }
 
 static void addToOcclusions(const LayoutBox* renderer, Vector<IntRect>& occlusions)
 {
     occlusions.append(IntRect(
         roundedIntPoint(renderer->localToAbsolute()),
         flooredIntSize(renderer->size())));
 }
 
 static void addTreeToOcclusions(const LayoutObject* renderer, const IntRect& frameRect, Vector<IntRect>& occlusions)
@@ skipping 64 matching lines @@
     // as being in the top layer.
     const Element* ancestor = topLayerAncestor(element);
     Document* document = parentFrameView->frame().document();
     const HeapVector<Member<Element>>& elements = document->topLayerElements();
     size_t start = ancestor ? elements.find(ancestor) + 1 : 0;
     for (size_t i = start; i < elements.size(); ++i)
         addTreeToOcclusions(elements[i]->layoutObject(), frameRect, occlusions);
 }
 
 } // namespace blink