Collect host of Web Component usage to send to RAPPOR

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 105 matching lines @@
 #include "core/fetch/AcceptClientHints.h"
 #include "core/fetch/ResourceFetcher.h"
 #include "core/frame/DOMTimer.h"
 #include "core/frame/EventHandlerRegistry.h"
 #include "core/frame/FrameConsole.h"
 #include "core/frame/FrameHost.h"
 #include "core/frame/FrameView.h"
 #include "core/frame/History.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
+#include "core/frame/OriginsUsingFeatures.h"
 #include "core/frame/PinchViewport.h"
 #include "core/frame/Settings.h"
 #include "core/frame/csp/ContentSecurityPolicy.h"
 #include "core/html/DocumentNameCollection.h"
 #include "core/html/HTMLAllCollection.h"
 #include "core/html/HTMLAnchorElement.h"
 #include "core/html/HTMLBaseElement.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLCollection.h"
 #include "core/html/HTMLDialogElement.h"
@@ skipping 670 matching lines @@
         element = createElement(qName, false);
 
     if (!typeExtension.isEmpty())
         CustomElementRegistrationContext::setIsAttributeAndTypeExtension(element.get(), typeExtension);
 
     return element.release();
 }
 
 ScriptValue Document::registerElement(ScriptState* scriptState, const AtomicString& name, const ElementRegistrationOptions& options, ExceptionState& exceptionState, CustomElement::NameSet validNames)
 {
+    OriginsUsingFeatures::count(scriptState, *this, OriginsUsingFeatures::Feature::DocumentRegisterElement);
+
     if (!registrationContext()) {
         exceptionState.throwDOMException(NotSupportedError, "No element registration context is available.");
         return ScriptValue();
     }
 
     CustomElementConstructorBuilder constructorBuilder(scriptState, options);
     registrationContext()->registerElement(this, &constructorBuilder, name, validNames, exceptionState);
     return constructorBuilder.bindingsReturnValue();
 }
 
@@ skipping 4909 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