Count presence of viewport tag as mobile-friendly

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 163 matching lines @@
     if (meta.name() == ogType || meta.getAttribute(propertyAttr) == ogType) {
       if (equalIgnoringCase(meta.content(), "article")) {
         return true;
       }
     }
   }
   return false;
 }
 
 bool isMobileFriendly(Document& document) {
-  if (FrameHost* frameHost = document.frameHost())
-    return frameHost->visualViewport().shouldDisableDesktopWorkarounds();
-  return false;
+  return document.viewportDescription().isSpecifiedByAuthor();
 }
 
 }  // namespace
 
 WebDistillabilityFeatures DocumentStatisticsCollector::collectStatistics(
     Document& document) {
   TRACE_EVENT0("blink", "DocumentStatisticsCollector::collectStatistics");
 
   WebDistillabilityFeatures features = WebDistillabilityFeatures();
 
@@ skipping 23 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