Oilpan: Schedule a precise GC when a page navigates

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 194 matching lines @@
     , public WillBeHeapSupplementable<Document>, public DocumentLifecycleNotifier {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Document);
 public:
     static PassRefPtrWillBeRawPtr<Document> create(const DocumentInit& initializer = DocumentInit())
     {
         return adoptRefWillBeNoop(new Document(initializer));
     }
     ~Document() override;
 
+    unsigned nodeCount() const;
+
     MediaQueryMatcher& mediaQueryMatcher();
 
     void mediaQueryAffectingValueChanged();
 
 #if !ENABLE(OILPAN)
     using ContainerNode::ref;
     using ContainerNode::deref;
 #endif
     using SecurityContext::securityOrigin;
     using SecurityContext::contentSecurityPolicy;
@@ skipping 1204 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