Drop WebCoreInterpolationQualityToSkFilterQuality

Source/core/paint/SVGPaintContext.cpp

 /*
  * Copyright (C) 2007, 2008 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) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2009-2010. 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
@@ skipping 196 matching lines @@
     if (!paintServer.isValid())
         return false;
 
     if (additionalPaintServerTransform && paintServer.isTransformDependent())
         paintServer.prependTransform(*additionalPaintServerTransform);
 
     const SVGComputedStyle& svgStyle = style.svgStyle();
     float paintAlpha = resourceMode == ApplyToFillMode ? svgStyle.fillOpacity() : svgStyle.strokeOpacity();
     paintServer.applyToSkPaint(paint, paintAlpha);
 
-    paint.setFilterQuality(WebCoreInterpolationQualityToSkFilterQuality(InterpolationDefault));
+    // We always set filter quality to 'low' here. This value will only have an
+    // effect for patterns, which are SkPictures, so using high-order filter
+    // should have little effect on the overall quality.
+    paint.setFilterQuality(kLow_SkFilterQuality);
 
     // TODO(fs): The color filter can set when generating a picture for a mask -
     // due to color-interpolation. We could also just apply the
     // color-interpolation property from the the shape itself (which could mean
     // the paintserver if it has it specified), since that would be more in line
     // with the spec for color-interpolation. For now, just steal it from the GC
     // though.
     // Additionally, it's not really safe/guaranteed to be correct, as
     // something down the paint pipe may want to farther tweak the color
     // filter, which could yield incorrect results. (Consider just using
     // saveLayer() w/ this color filter explicitly instead.)
     paint.setColorFilter(paintInfo.context->colorFilter());
     return true;
 }
 
 } // namespace blink