Scale objectBoundingBox units for primitive dimensions w/ -webkit-filter

Source/core/layout/svg/ReferenceFilterBuilder.cpp

 /*
  * Copyright (C) 2013 Adobe Systems Inc. All rights reserved.
  * Copyright (C) 2013 Google Inc.  All rights reserved.
  * Copyright (C) 2011 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
@@ skipping 106 matching lines @@
     if (!isSVGFilterElement(*filter))
         return nullptr;
 
     SVGFilterElement& filterElement = toSVGFilterElement(*filter);
 
     FloatRect referenceBox;
     if (element->inDocument() && element->layoutObject() && element->layoutObject()->isBoxModelObject())
         referenceBox = toLayoutBoxModelObject(element->layoutObject())->borderBoundingBox();
     referenceBox.scale(1.0f / zoom);
     FloatRect filterRegion = SVGLengthContext::resolveRectangle<SVGFilterElement>(&filterElement, filterElement.filterUnits()->currentValue()->enumValue(), referenceBox);
-    RefPtrWillBeRawPtr<Filter> result(Filter::create(referenceBox, filterRegion, zoom));
+    bool primitiveBoundingBoxMode = filterElement.primitiveUnits()->currentValue()->enumValue() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX;
+    Filter::UnitScaling unitScaling = primitiveBoundingBoxMode ? Filter::BoundingBox : Filter::UserSpace;
+    RefPtrWillBeRawPtr<Filter> result(Filter::create(referenceBox, filterRegion, zoom, unitScaling));
     if (!previousEffect)
         previousEffect = result->sourceGraphic();
     RefPtrWillBeRawPtr<SVGFilterBuilder> builder = SVGFilterBuilder::create(previousEffect);
 
     EColorInterpolation filterColorInterpolation = colorInterpolationForElement(filterElement, CI_AUTO);
 
     for (SVGElement* element = Traversal<SVGElement>::firstChild(filterElement); element; element = Traversal<SVGElement>::nextSibling(*element)) {
         if (!element->isFilterEffect())
             continue;
 
         SVGFilterPrimitiveStandardAttributes* effectElement = static_cast<SVGFilterPrimitiveStandardAttributes*>(element);
         RefPtrWillBeRawPtr<FilterEffect> effect = effectElement->build(builder.get(), result.get());
         if (!effect)
             continue;
 
         effectElement->setStandardAttributes(effect.get());
         effect->setEffectBoundaries(SVGLengthContext::resolveRectangle<SVGFilterPrimitiveStandardAttributes>(effectElement, filterElement.primitiveUnits()->currentValue()->enumValue(), referenceBox));
         EColorInterpolation colorInterpolation = colorInterpolationForElement(*effectElement, filterColorInterpolation);
         effect->setOperatingColorSpace(colorInterpolation == CI_LINEARRGB ? ColorSpaceLinearRGB : ColorSpaceDeviceRGB);
         builder->add(AtomicString(effectElement->result()->currentValue()->value()), effect);
     }
     result->setLastEffect(builder->lastEffect());
     return result.release();
 }
 
 } // namespace blink