Don't propagate bbox for empty <text> to ancestors

third_party/WebKit/Source/core/layout/svg/LayoutSVGText.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) Research In Motion Limited 2010-2012. 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 26 matching lines @@
     ~LayoutSVGText() override;
 
     bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override;
 
     void setNeedsPositioningValuesUpdate() { m_needsPositioningValuesUpdate = true; }
     void setNeedsTransformUpdate() override { m_needsTransformUpdate = true; }
     void setNeedsTextMetricsUpdate() { m_needsTextMetricsUpdate = true; }
     FloatRect paintInvalidationRectInLocalCoordinates() const override;
     FloatRect objectBoundingBox() const override { return FloatRect(frameRect()); }
     FloatRect strokeBoundingBox() const override;
+    bool isObjectBoundingBoxValid() const;
 
     static LayoutSVGText* locateLayoutSVGTextAncestor(LayoutObject*);
     static const LayoutSVGText* locateLayoutSVGTextAncestor(const LayoutObject*);
 
     bool needsReordering() const { return m_needsReordering; }
     Vector<SVGTextLayoutAttributes*>& layoutAttributes() { return m_layoutAttributes; }
 
     void subtreeChildWasAdded(LayoutObject*);
     void subtreeChildWillBeRemoved(LayoutObject*, Vector<SVGTextLayoutAttributes*, 2>& affectedAttributes);
     void subtreeChildWasRemoved(const Vector<SVGTextLayoutAttributes*, 2>& affectedAttributes);
@@ skipping 31 matching lines @@
     bool m_needsTextMetricsUpdate : 1;
     SVGTextLayoutAttributesBuilder m_layoutAttributesBuilder;
     Vector<SVGTextLayoutAttributes*> m_layoutAttributes;
 };
 
 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGText, isSVGText());
 
 } // namespace blink
 
 #endif