Inhibit title update when removing children before setting new value

Source/core/html/HTMLTitleElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2010 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 #ifndef HTMLTitleElement_h
 #define HTMLTitleElement_h
 
 #include "core/html/HTMLElement.h"
 
 namespace WebCore {
 
+using namespace HTMLNames;
+
 class HTMLTitleElement FINAL : public HTMLElement {
 public:
     static PassRefPtr<HTMLTitleElement> create(Document&);
 
     String text() const;
     void setText(const String&);
 
 private:
+    friend class IgnoreTitleUpdatesWhenChildrenChange;
     explicit HTMLTitleElement(Document&);
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
     virtual void childrenChanged(bool changedByParser = false, Node* beforeChange = 0, Node* afterChange = 0, int childCountDelta = 0);
+
+    bool m_ignoreTitleUpdatesWhenChildrenChange;
 };
 
 DEFINE_NODE_TYPE_CASTS(HTMLTitleElement, hasTagName(HTMLNames::titleTag));
 
+class IgnoreTitleUpdatesWhenChildrenChange {
+public:
+    IgnoreTitleUpdatesWhenChildrenChange(PassRefPtr<HTMLTitleElement> titleElement) : m_titleElement(titleElement)
+    {
+        m_titleElement->m_ignoreTitleUpdatesWhenChildrenChange = true;
+    }
+    ~IgnoreTitleUpdatesWhenChildrenChange()
+    {
+        m_titleElement->m_ignoreTitleUpdatesWhenChildrenChange = false;
+    }
+private:
+    RefPtr<HTMLTitleElement> m_titleElement;
+};
+
 } //namespace
 
 #endif