Add use counters to determine the fate of the disabled attribute

Source/core/html/HTMLLinkElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2009 Rob Buis (rwlbuis@gmail.com)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 25 matching lines @@
 #include "core/dom/Document.h"
 #include "core/dom/StyleEngine.h"
 #include "core/events/Event.h"
 #include "core/events/EventSender.h"
 #include "core/fetch/CSSStyleSheetResource.h"
 #include "core/fetch/FetchRequest.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/SubresourceIntegrity.h"
+#include "core/frame/UseCounter.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/LinkDefaultPresentation.h"
 #include "core/html/LinkManifest.h"
 #include "core/html/imports/LinkImport.h"
 #include "core/inspector/ConsoleMessage.h"
 #include "core/style/StyleInheritedData.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "platform/RuntimeEnabledFeatures.h"
 #include "wtf/StdLibExtras.h"
@@ skipping 120 matching lines @@
         m_as = value;
         process();
     } else if (name == sizesAttr) {
         m_sizes->setValue(value);
         parseSizesAttribute(value, m_iconSizes);
         process();
     } else if (name == mediaAttr) {
         m_media = value.lower();
         process();
     } else if (name == disabledAttr) {
+        UseCounter::count(document(), UseCounter::HTMLLinkElementDisabled);
         if (LinkStyle* link = linkStyle())
             link->setDisabledState(!value.isNull());
     } else {
         if (name == titleAttr) {
             if (LinkStyle* link = linkStyle())
                 link->setSheetTitle(value);
         }
 
         HTMLElement::parseAttribute(name, value);
     }
@@ skipping 19 matching lines @@
 
     if (!m_link) {
         if (m_relAttribute.isImport()) {
             m_link = LinkImport::create(this);
         } else if (m_relAttribute.isManifest()) {
             m_link = LinkManifest::create(this);
         } else if (m_relAttribute.isDefaultPresentation()) {
             m_link = LinkDefaultPresentation::create(this);
         } else {
             OwnPtrWillBeRawPtr<LinkStyle> link = LinkStyle::create(this);
-            if (fastHasAttribute(disabledAttr))
+            if (fastHasAttribute(disabledAttr)) {
+                UseCounter::count(document(), UseCounter::HTMLLinkElementDisabled);
                 link->setDisabledState(true);
+            }
             m_link = link.release();
         }
     }
 
     return m_link.get();
 }
 
 LinkStyle* HTMLLinkElement::linkStyle() const
 {
     if (!m_link || m_link->type() != LinkResource::Style)
@@ skipping 529 matching lines @@
         removePendingSheet();
 }
 
 DEFINE_TRACE(LinkStyle)
 {
     visitor->trace(m_sheet);
     LinkResource::trace(visitor);
 }
 
 } // namespace blink