Add use-counters for Client-Hints features

Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) Research In Motion Limited 2010-2011. All rights reserved.
@@ skipping 2942 matching lines @@
         contentSecurityPolicy()->didReceiveHeader(content, ContentSecurityPolicyHeaderTypeEnforce, ContentSecurityPolicyHeaderSourceMeta);
     else if (equalIgnoringCase(equiv, "content-security-policy-report-only"))
         contentSecurityPolicy()->didReceiveHeader(content, ContentSecurityPolicyHeaderTypeReport, ContentSecurityPolicyHeaderSourceMeta);
     else
         ASSERT_NOT_REACHED();
 }
 
 void Document::processHttpEquivAcceptCH(const AtomicString& content)
 {
     if (frame())
-        handleAcceptClientHintsHeader(content, m_clientHintsPreferences);
+        handleAcceptClientHintsHeader(content, m_clientHintsPreferences, fetcher());
 }
 
 void Document::processHttpEquivDefaultStyle(const AtomicString& content)
 {
     // The preferred style set has been overridden as per section
     // 14.3.2 of the HTML4.0 specification. We need to update the
     // sheet used variable and then update our style selector.
     // For more info, see the test at:
     // http://www.hixie.ch/tests/evil/css/import/main/preferred.html
     // -dwh
@@ skipping 2764 matching lines @@
 #ifndef NDEBUG
 using namespace blink;
 void showLiveDocumentInstances()
 {
     WeakDocumentSet& set = liveDocumentSet();
     fprintf(stderr, "There are %u documents currently alive:\n", set.size());
     for (Document* document : set)
         fprintf(stderr, "- Document %p URL: %s\n", document, document->url().string().utf8().data());
 }
 #endif