[SVG] Resources should be laid out in dependecy order.

Source/core/rendering/svg/SVGRenderSupport.h

 /**
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Google, Inc.  All rights reserved.
  * 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
@@ skipping 28 matching lines @@
 class RenderStyle;
 class RenderSVGRoot;
 class TransformState;
 
 // SVGRendererSupport is a helper class sharing code between all SVG renderers.
 class SVGRenderSupport {
 public:
     // Shares child layouting code between RenderSVGRoot/RenderSVG(Hidden)Container
     static void layoutChildren(RenderObject*, bool selfNeedsLayout);
 
+    // Layout resources used by this node.
+    static void layoutResourcesIfNeeded(const RenderObject*);
+
     // Helper function determining wheter overflow is hidden
     static bool isOverflowHidden(const RenderObject*);
 
     // Calculates the repaintRect in combination with filter, clipper and masker in local coordinates.
     static void intersectRepaintRectWithResources(const RenderObject*, FloatRect&);
 
     // Determines whether a container needs to be laid out because it's filtered and a child is being laid out.
     static bool filtersForceContainerLayout(RenderObject*);
 
     // Determines whether the passed point lies in a clipping area
@@ skipping 24 matching lines @@
 
 private:
     // This class is not constructable.
     SVGRenderSupport();
     ~SVGRenderSupport();
 };
 
 } // namespace WebCore
 
 #endif // SVGRenderSupport_h