Add prototype accessors to <framelet>.

third_party/WebKit/Source/core/html/HTMLFrameletElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2004, 2006, 2008, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 23 matching lines @@
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(HTMLFrameletElement);
 
 public:
     DECLARE_NODE_FACTORY(HTMLFrameletElement);
     ~HTMLFrameletElement() override;
 
     BLINK_EXPORT void setWebLayer(WebLayer*);
     WebLayer* webLayer() { return m_webLayer; }
 
+    WTF::String bytesUsed() const { return WTF::String::number(m_bytesUsed); }
+    WTF::String trackBytesUsed() const { return m_trackBytesUsed ? WTF::String("true") : WTF::String("false"); }
+    void setTrackBytesUsed(const WTF::String& val);
+
     // Node overrides
     bool isFrameletElement() const override { return true; }
 
 private:
     explicit HTMLFrameletElement(Document&);
 
     void parseAttribute(const QualifiedName&, const AtomicString&, const AtomicString&) override;
     void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) override;
 
     bool layoutObjectIsNeeded(const ComputedStyle&) override;
     LayoutObject* createLayoutObject(const ComputedStyle&) override;
 
     bool isInteractiveContent() const override { return true; }
 
     Node::InsertionNotificationRequest insertedInto(ContainerNode* insertionPoint) override;
     void didNotifySubtreeInsertionsToDocument() final;
 
     WebLayer* m_webLayer;
+    int m_bytesUsed;
+    bool m_trackBytesUsed;
 };
 
 } // namespace blink
 
 #endif // HTMLFrameletElement_h