Merge two determineFilterPrimitiveSubregion implementations

Source/core/rendering/svg/RenderSVGResourceFilter.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.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
@@ skipping 188 matching lines @@
     tempSourceRect.scale(scale.width(), scale.height());
     fitsInMaximumImageSize(tempSourceRect.size(), scale);
 
     // Set the scale level in SVGFilter.
     filterData->filter->setFilterResolution(scale);
 
     FilterEffect* lastEffect = filterData->builder->lastEffect();
     if (!lastEffect)
         return false;
 
-    RenderSVGResourceFilterPrimitive::determineFilterPrimitiveSubregion(lastEffect);
+    lastEffect->determineFilterPrimitiveSubregion(ClipToFilterRegion);
     FloatRect subRegion = lastEffect->maxEffectRect();
     // At least one FilterEffect has a too big image size,
     // recalculate the effect sizes with new scale factors.
     if (!fitsInMaximumImageSize(subRegion.size(), scale)) {
         filterData->filter->setFilterResolution(scale);
-        RenderSVGResourceFilterPrimitive::determineFilterPrimitiveSubregion(lastEffect);
+        lastEffect->determineFilterPrimitiveSubregion(ClipToFilterRegion);
     }
 
     // If the drawingRegion is empty, we have something like <g filter=".."/>.
     // Even if the target objectBoundingBox() is empty, we still have to draw the last effect result image in postApplyResource.
     if (filterData->drawingRegion.isEmpty()) {
         ASSERT(!m_filter.contains(object));
         filterData->savedContext = context;
         m_filter.set(object, filterData.release());
         return false;
     }
@@ skipping 133 matching lines @@
     markAllClientLayersForInvalidation();
 }
 
 FloatRect RenderSVGResourceFilter::drawingRegion(RenderObject* object) const
 {
     FilterData* filterData = m_filter.get(object);
     return filterData ? filterData->drawingRegion : FloatRect();
 }
 
 }