Devirtualize Document class type checking

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 355 matching lines @@
 static void printNavigationErrorMessage(Frame* frame, const KURL& activeURL, const char* reason)
 {
     String message = "Unsafe JavaScript attempt to initiate navigation for frame with URL '" + frame->document()->url().string() + "' from frame with URL '" + activeURL.string() + "'. " + reason + "\n";
 
     // FIXME: should we print to the console of the document performing the navigation instead?
     frame->document()->domWindow()->printErrorMessage(message);
 }
 
 uint64_t Document::s_globalTreeVersion = 0;
 
-Document::Document(Frame* frame, const KURL& url, bool isXHTML, bool isHTML)
+Document::Document(Frame* frame, const KURL& url, unsigned documentClass)
     : ContainerNode(0, CreateDocument)
     , TreeScope(this)
     , m_styleResolverThrowawayTimer(this, &Document::styleResolverThrowawayTimerFired)
     , m_lastStyleResolverAccessTime(0)
     , m_activeParserCount(0)
     , m_contextFeatures(ContextFeatures::defaultSwitch())
     , m_compatibilityMode(NoQuirksMode)
     , m_compatibilityModeLocked(false)
     , m_domTreeVersion(++s_globalTreeVersion)
     , m_mutationObserverTypes(0)
@@ skipping 14 matching lines @@
     , m_scriptRunner(ScriptRunner::create(this))
     , m_xmlVersion("1.0")
     , m_xmlStandalone(StandaloneUnspecified)
     , m_hasXMLDeclaration(0)
     , m_designMode(inherit)
     , m_hasAnnotatedRegions(false)
     , m_annotatedRegionsDirty(false)
     , m_createRenderers(true)
     , m_accessKeyMapValid(false)
     , m_useSecureKeyboardEntryWhenActive(false)
-    , m_isXHTML(isXHTML)
-    , m_isHTML(isHTML)
+    , m_documentClass(documentClass)
     , m_isViewSource(false)
     , m_sawElementsInKnownNamespaces(false)
     , m_isSrcdocDocument(false)
     , m_renderer(0)
     , m_eventQueue(DocumentEventQueue::create(this))
     , m_weakFactory(this)
     , m_idAttributeName(idAttr)
     , m_areKeysEnabledInFullScreen(0)
     , m_fullScreenRenderer(0)
     , m_fullScreenChangeDelayTimer(this, &Document::fullScreenChangeDelayTimerFired)
@@ skipping 330 matching lines @@
     clearStyleResolver();
 }
 
 PassRefPtr<Element> Document::createElement(const AtomicString& name, ExceptionCode& ec)
 {
     if (!isValidName(name)) {
         ec = INVALID_CHARACTER_ERR;
         return 0;
     }
 
-    if (m_isXHTML)
+    if (isXHTMLDocument())
         return HTMLElementFactory::createHTMLElement(QualifiedName(nullAtom, name, xhtmlNamespaceURI), this, 0, false);
 
     return createElement(QualifiedName(nullAtom, name, nullAtom), false);
 }
 
 PassRefPtr<Element> Document::createElement(const AtomicString& localName, const AtomicString& typeExtension, ExceptionCode& ec)
 {
     if (!isValidName(localName)) {
         ec = INVALID_CHARACTER_ERR;
         return 0;
@@ skipping 4880 matching lines @@
         return;
 
     Vector<RefPtr<Element> > associatedFormControls;
     copyToVector(m_associatedFormControls, associatedFormControls);
 
     frame()->page()->chrome()->client()->didAssociateFormControls(associatedFormControls);
     m_associatedFormControls.clear();
 }
 
 } // namespace WebCore