Clear SVGInlineTextBox fragments when the text changes.

Source/core/rendering/svg/SVGInlineTextBox.h

 /*
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010. 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 39 matching lines @@
     virtual LayoutRect localSelectionRect(int startPosition, int endPosition);
 
     bool mapStartEndPositionsIntoFragmentCoordinates(const SVGTextFragment&, int& startPosition, int& endPosition) const;
 
     virtual FloatRect calculateBoundaries() const;
 
     void clearTextFragments() { m_textFragments.clear(); }
     Vector<SVGTextFragment>& textFragments() { return m_textFragments; }
     const Vector<SVGTextFragment>& textFragments() const { return m_textFragments; }
 
-    virtual void dirtyLineBoxes() OVERRIDE;
+    virtual void dirtyLineBoxes() OVERRIDE FINAL;
 
     bool startsNewTextChunk() const { return m_startsNewTextChunk; }
     void setStartsNewTextChunk(bool newTextChunk) { m_startsNewTextChunk = newTextChunk; }
 
     int offsetForPositionInFragment(const SVGTextFragment&, float position, bool includePartialGlyphs) const;
     FloatRect selectionRectForTextFragment(const SVGTextFragment&, int fragmentStartPosition, int fragmentEndPosition, RenderStyle*);
 
 private:
     TextRun constructTextRun(RenderStyle*, const SVGTextFragment&) const;
 
@@ skipping 15 matching lines @@
     unsigned m_paintingResourceMode : 4;
     unsigned m_startsNewTextChunk : 1;
     RenderSVGResource* m_paintingResource;
     Vector<SVGTextFragment> m_textFragments;
 };
 
 } // namespace WebCore
 
 #endif
 #endif // SVGInlineTextBox_h