Implement canHaveWhitespaceChildren on RenderSVG{Root,ModelObject}

Source/core/rendering/svg/RenderSVGRoot.h

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * Copyright (C) 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 61 matching lines @@
     virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred  = ComputeActual) const OVERRIDE;
     virtual LayoutUnit computeReplacedLogicalHeight() const OVERRIDE;
     virtual void layout() OVERRIDE;
     virtual void paintReplaced(PaintInfo&, const LayoutPoint&) OVERRIDE;
 
     virtual void willBeDestroyed() OVERRIDE;
     virtual void styleDidChange(StyleDifference, const RenderStyle* oldStyle) OVERRIDE;
     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const OVERRIDE;
     virtual void addChild(RenderObject* child, RenderObject* beforeChild = 0) OVERRIDE;
     virtual void removeChild(RenderObject*) OVERRIDE;
+    virtual bool canHaveWhitespaceChildren() const OVERRIDE { return false; }
 
     virtual void insertedIntoTree() OVERRIDE;
     virtual void willBeRemovedFromTree() OVERRIDE;
 
     virtual const AffineTransform& localToParentTransform() const OVERRIDE;
 
     virtual FloatRect objectBoundingBox() const OVERRIDE { return m_objectBoundingBox; }
     virtual FloatRect strokeBoundingBox() const OVERRIDE { return m_strokeBoundingBox; }
     virtual FloatRect repaintRectInLocalCoordinates() const OVERRIDE { return m_repaintBoundingBox; }
 
@@ skipping 21 matching lines @@
     AffineTransform m_localToBorderBoxTransform;
     bool m_isLayoutSizeChanged : 1;
     bool m_needsBoundariesOrTransformUpdate : 1;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderSVGRoot, isSVGRoot());
 
 } // namespace WebCore
 
 #endif // RenderSVGRoot_h