Add use counters for secure/insecure OpenSearch links and registerProtocolHandler

third_party/WebKit/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 4539 matching lines @@
         return KURL();
 
     if (!head())
         return KURL();
 
     for (HTMLLinkElement* linkElement = Traversal<HTMLLinkElement>::firstChild(*head()); linkElement; linkElement = Traversal<HTMLLinkElement>::nextSibling(*linkElement)) {
         if (!equalIgnoringCase(linkElement->type(), openSearchMIMEType) || !equalIgnoringCase(linkElement->rel(), openSearchRelation))
             continue;
         if (linkElement->href().isEmpty())
             continue;
+
+        // Count usage; perhaps we can lock this to secure contexts.
+        UseCounter::Feature osdDisposition;
+        RefPtr<SecurityOrigin> target = SecurityOrigin::create(linkElement->href());
+        if (isSecureContext()) {
+            osdDisposition = target->isPotentiallyTrustworthy()
+                ? UseCounter::OpenSearchSecureOriginSecureTarget
+                : UseCounter::OpenSearchSecureOriginInsecureTarget;
+        } else {
+            osdDisposition = target->isPotentiallyTrustworthy()
+                ? UseCounter::OpenSearchInsecureOriginSecureTarget
+                : UseCounter::OpenSearchInsecureOriginInsecureTarget;
+        }
+        UseCounter::count(*this, osdDisposition);
+
         return linkElement->href();
     }
 
     return KURL();
 }
 
 void Document::currentScriptForBinding(HTMLScriptElementOrSVGScriptElement& scriptElement) const
 {
     if (Element* script = currentScript()) {
         if (script->isInV1ShadowTree())
@@ skipping 1438 matching lines @@
 }
 
 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().getString().utf8().data());
 }
 #endif