Count usage of PROGRESS element with -webkit-appearance:none.

third_party/WebKit/Source/core/html/HTMLProgressElement.cpp

 /*
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 40 matching lines @@
 
 HTMLProgressElement* HTMLProgressElement::create(Document& document)
 {
     HTMLProgressElement* progress = new HTMLProgressElement(document);
     progress->ensureUserAgentShadowRoot();
     return progress;
 }
 
 LayoutObject* HTMLProgressElement::createLayoutObject(const ComputedStyle& style)
 {
-    if (!style.hasAppearance() || openShadowRoot())
+    if (!style.hasAppearance()) {
+        UseCounter::count(document(), UseCounter::ProgressElementWithNoneAppearance);
         return LayoutObject::createObject(this, style);
+    }
+    UseCounter::count(document(), UseCounter::ProgressElementWithProgressBarAppearance);
     return new LayoutProgress(this);
 }
 
 LayoutProgress* HTMLProgressElement::layoutProgress() const
 {
     if (layoutObject() && layoutObject()->isProgress())
         return toLayoutProgress(layoutObject());
     return nullptr;
 }
 
@@ skipping 95 matching lines @@
     visitor->trace(m_value);
     LabelableElement::trace(visitor);
 }
 
 void HTMLProgressElement::setValueWidthPercentage(double width) const
 {
     m_value->setInlineStyleProperty(CSSPropertyWidth, width, CSSPrimitiveValue::UnitType::Percentage);
 }
 
 } // namespace blink