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

third_party/WebKit/Source/core/dom/DocumentStatisticsCollector.cpp

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "DocumentStatisticsCollector.h"
 
 #include "core/HTMLNames.h"
 #include "core/InputTypeNames.h"
 #include "core/dom/ElementTraversal.h"
 #include "core/dom/NodeComputedStyle.h"
@@ skipping 46 matching lines @@
     return length;
 }
 
 bool isVisible(const Element& element)
 {
     const ComputedStyle* style = element.computedStyle();
     if (!style)
         return false;
     return (
         style->display() != NONE
-        && style->visibility() != HIDDEN
+        && style->visibility() != EVisibility::Hidden
         && style->opacity() != 0
     );
 }
 
 bool matchAttributes(const Element& element, const Vector<String>& words)
 {
     const String& classes = element.getClassAttribute();
     const String& id = element.getIdAttribute();
     for (const String& word : words) {
         if (classes.findIgnoringCase(word) != WTF::kNotFound
@@ skipping 167 matching lines @@
 
     double elapsedTime = monotonicallyIncreasingTime() - startTime;
 
     DEFINE_STATIC_LOCAL(CustomCountHistogram, distillabilityHistogram, ("WebCore.DistillabilityUs", 1, 1000000, 50));
     distillabilityHistogram.count(static_cast<int>(1e6 * elapsedTime));
 
     return features;
 }
 
 } // namespace blink