Fix SVGDocument return title that is not a child of the root element

third_party/WebKit/Source/core/svg/SVGTitleElement.h

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 12 matching lines @@
 
 #include "core/svg/SVGElement.h"
 
 namespace blink {
 
 class SVGTitleElement final : public SVGElement {
     DEFINE_WRAPPERTYPEINFO();
 public:
     DECLARE_NODE_FACTORY(SVGTitleElement);
 
+    void setText(const String&);
+
 private:
     explicit SVGTitleElement(Document&);
 
     InsertionNotificationRequest insertedInto(ContainerNode*) override;
     void removedFrom(ContainerNode*) override;
     void childrenChanged(const ChildrenChange&) override;
 
     bool layoutObjectIsNeeded(const ComputedStyle&) override { return false; }
+
+    bool m_ignoreTitleUpdatesWhenChildrenChange;
 };
 
 } // namespace blink
 
 #endif // SVGTitleElement_h