Count DOMImplementation.hasFeature usage and cases where it returns false

Source/core/dom/DOMImplementation.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) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Samuel Weinig (sam@webkit.org)
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 28 matching lines @@
 #include "core/dom/custom/CustomElementRegistrationContext.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/HTMLMediaElement.h"
 #include "core/html/HTMLViewSourceDocument.h"
 #include "core/html/ImageDocument.h"
 #include "core/html/MediaDocument.h"
 #include "core/html/PluginDocument.h"
 #include "core/html/TextDocument.h"
 #include "core/loader/FrameLoader.h"
 #include "core/frame/Frame.h"
+#include "core/frame/UseCounter.h"
 #include "core/page/Page.h"
 #include "core/svg/SVGDocument.h"
 #include "platform/ContentType.h"
 #include "platform/MIMETypeRegistry.h"
 #include "platform/graphics/Image.h"
 #include "platform/graphics/media/MediaPlayer.h"
 #include "platform/plugins/PluginData.h"
 #include "platform/weborigin/SecurityOrigin.h"
 #include "wtf/StdLibExtras.h"
 
@@ skipping 111 matching lines @@
 {
     if (feature.startsWith("http://www.w3.org/TR/SVG", false)
     || feature.startsWith("org.w3c.dom.svg", false)
     || feature.startsWith("org.w3c.svg", false)) {
         // FIXME: SVG 2.0 support?
         return isSupportedSVG10Feature(feature, version) || isSupportedSVG11Feature(feature, version);
     }
     return true;
 }
 
+bool DOMImplementation::hasFeatureForBindings(const String& feature, const String& version)
+{
+    if (!hasFeature(feature, version)) {
+        UseCounter::count(m_document, UseCounter::DOMImplementationHasFeatureReturnFalse);
+        return false;
+    }
+    return true;
+}
+
 PassRefPtr<DocumentType> DOMImplementation::createDocumentType(const AtomicString& qualifiedName,
     const String& publicId, const String& systemId, ExceptionState& exceptionState)
 {
     AtomicString prefix, localName;
     if (!Document::parseQualifiedName(qualifiedName, prefix, localName, exceptionState))
         return 0;
 
     return DocumentType::create(&m_document, qualifiedName, publicId, systemId);
 }
 
@@ skipping 186 matching lines @@
         return TextDocument::create(init);
     if (type == "image/svg+xml")
         return SVGDocument::create(init);
     if (isXMLMIMEType(type))
         return Document::create(init);
 
     return HTMLDocument::create(init);
 }
 
 }