Drop WebCoreInterpolationQualityToSkFilterQuality

Source/platform/graphics/skia/SkiaUtils.h

 /*
  * Copyright (c) 2006,2007,2008, Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 43 matching lines @@
 int PLATFORM_EXPORT clampedAlphaForBlending(float);
 
 // Multiply a color's alpha channel by an additional alpha factor where
 // alpha is in the range [0, 1].
 SkColor PLATFORM_EXPORT scaleAlpha(SkColor, float);
 
 // Multiply a color's alpha channel by an additional alpha factor where
 // alpha is in the range [0, 256].
 SkColor PLATFORM_EXPORT scaleAlpha(SkColor, int);
 
-inline SkFilterQuality WebCoreInterpolationQualityToSkFilterQuality(InterpolationQuality quality)
-{
-    // FIXME: this reflects existing client mappings, but should probably
-    // be expanded to map higher level interpolations more accurately.
-    return quality != InterpolationNone ? kLow_SkFilterQuality : kNone_SkFilterQuality;
-}
-
 // Skia has problems when passed infinite, etc floats, filter them to 0.
 inline SkScalar WebCoreFloatToSkScalar(float f)
 {
     return SkFloatToScalar(std::isfinite(f) ? f : 0);
 }
 
 inline SkScalar WebCoreDoubleToSkScalar(double d)
 {
     return SkDoubleToScalar(std::isfinite(d) ? d : 0);
 }
@@ skipping 49 matching lines @@
     SkASSERT(radius >= 0);
     return 0.288675f * radius + 0.5f;
 }
 
 template<typename PrimitiveType>
 void drawPlatformFocusRing(const PrimitiveType&, SkCanvas*, SkColor, int width);
 
 } // namespace blink
 
 #endif  // SkiaUtils_h