Track connected subframes per-Document instead of per-Node.

third_party/WebKit/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 24 matching lines @@
 #include "core/animation/CompositorPendingAnimations.h"
 #include "core/dom/ContainerNode.h"
 #include "core/dom/DocumentEncodingData.h"
 #include "core/dom/DocumentInit.h"
 #include "core/dom/DocumentLifecycle.h"
 #include "core/dom/DocumentLifecycleNotifier.h"
 #include "core/dom/DocumentLifecycleObserver.h"
 #include "core/dom/DocumentTiming.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/dom/MutationObserver.h"
+#include "core/dom/SubframeTracker.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/fetch/ClientHintsPreferences.h"
 #include "core/frame/DOMTimerCoordinator.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/OriginsUsingFeatures.h"
 #include "core/html/CollectionType.h"
@@ skipping 992 matching lines @@
     static bool threadedParsingEnabledForTesting();
 
     void incrementNodeCount() { m_nodeCount++; }
     void decrementNodeCount()
     {
         ASSERT(m_nodeCount > 0);
         m_nodeCount--;
     }
     int nodeCount() const { return m_nodeCount; }
 
+    SubframeTracker& subframeTracker() { return m_subframeTracker; }
+
     using WeakDocumentSet = WillBeHeapHashSet<RawPtrWillBeWeakMember<Document>>;
     static WeakDocumentSet& liveDocumentSet();
 
     WebTaskRunner* loadingTaskRunner() const;
     WebTaskRunner* timerTaskRunner() const;
 
     void enforceStrictMixedContentChecking();
 
 protected:
     Document(const DocumentInit&, DocumentClassFlags = DefaultDocumentClass);
@@ skipping 159 matching lines @@
 
     uint64_t m_domTreeVersion;
     static uint64_t s_globalTreeVersion;
 
     uint64_t m_styleVersion;
 
     WillBeHeapHashSet<RawPtrWillBeWeakMember<NodeIterator>> m_nodeIterators;
     using AttachedRangeSet = WillBeHeapHashSet<RawPtrWillBeWeakMember<Range>>;
     AttachedRangeSet m_ranges;
 
+    SubframeTracker m_subframeTracker;
+
     unsigned short m_listenerTypes;
 
     MutationObserverOptions m_mutationObserverTypes;
 
     OwnPtrWillBeMember<StyleEngine> m_styleEngine;
     RefPtrWillBeMember<StyleSheetList> m_styleSheetList;
 
     OwnPtrWillBeMember<FormController> m_formController;
 
     TextLinkColors m_textLinkColors;
@@ skipping 200 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 } // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif // Document_h