Turn DocumentParser::pinToMainThread into a cleaner api

Source/core/dom/Document.h

 /*
  * 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, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
@@ skipping 29 matching lines @@
 #include "core/dom/DocumentTiming.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/MutationObserver.h"
 #include "core/dom/TextLinkColors.h"
 #include "core/dom/TreeScope.h"
 #include "core/dom/UserActionElementSet.h"
 #include "core/dom/ViewportDescription.h"
 #include "core/dom/custom/CustomElement.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/html/CollectionType.h"
+#include "core/html/parser/ParserSynchronizationPolicy.h"
 #include "core/page/FocusType.h"
 #include "core/page/PageVisibilityState.h"
 #include "platform/Length.h"
 #include "platform/Timer.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
 #include "platform/weborigin/ReferrerPolicy.h"
 #include "wtf/HashSet.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
@@ skipping 444 matching lines @@
     void clearAXObjectCache();
 
     // to get visually ordered hebrew and arabic pages right
     bool visuallyOrdered() const { return m_visuallyOrdered; }
 
     DocumentLoader* loader() const;
 
     void open(Document* ownerDocument = nullptr, ExceptionState& = ASSERT_NO_EXCEPTION);
     PassRefPtrWillBeRawPtr<DocumentParser> implicitOpen();
 
+    void forceSynchronousParsing();
+
     // close() is the DOM API document.close()
     void close(ExceptionState& = ASSERT_NO_EXCEPTION);
     // In some situations (see the code), we ignore document.close().
     // explicitClose() bypass these checks and actually tries to close the
     // input stream.
     void explicitClose();
     // implicitClose() actually does the work of closing the input stream.
     void implicitClose();
 
     bool dispatchBeforeUnloadEvent(Chrome&, bool&);
@@ skipping 851 matching lines @@
 
     WillBeHeapHashSet<RawPtrWillBeMember<SVGUseElement>> m_useElementsNeedingUpdate;
     WillBeHeapHashSet<RawPtrWillBeMember<Element>> m_layerUpdateSVGFilterElements;
 
     bool m_hasViewportUnits;
 
     using DocumentVisibilityObserverSet = WillBeHeapHashSet<RawPtrWillBeWeakMember<DocumentVisibilityObserver>>;
     DocumentVisibilityObserverSet m_visibilityObservers;
 
     int m_styleRecalcElementCounter;
+
+    ParserSynchronizationPolicy m_backgroundParsingPolicy;
 };
 
 inline bool Document::shouldOverrideLegacyDescription(ViewportDescription::Type origin)
 {
     // The different (legacy) meta tags have different priorities based on the type
     // regardless of which order they appear in the DOM. The priority is given by the
     // ViewportDescription::Type enum.
     return origin >= m_legacyViewportDescription.type;
 }
 
@@ skipping 27 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h