Harmonize FilterEffect::mapRect and mapPaintRect

third_party/WebKit/Source/platform/graphics/filters/FEOffset.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.
  * Copyright (C) 2013 Google Inc. 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 45 matching lines @@
 float FEOffset::dy() const
 {
     return m_dy;
 }
 
 void FEOffset::setDy(float dy)
 {
     m_dy = dy;
 }
 
-FloatRect FEOffset::mapRect(const FloatRect& rect, bool forward) const
+FloatRect FEOffset::mapEffect(const FloatRect& rect) const
 {
     FloatRect result = rect;
-    if (forward)
-        result.move(getFilter()->applyHorizontalScale(m_dx), getFilter()->applyVerticalScale(m_dy));
-    else
-        result.move(-getFilter()->applyHorizontalScale(m_dx), -getFilter()->applyVerticalScale(m_dy));
+    result.move(getFilter()->applyHorizontalScale(m_dx), getFilter()->applyVerticalScale(m_dy));
     return result;
 }
 
 sk_sp<SkImageFilter> FEOffset::createImageFilter()
 {
     Filter* filter = this->getFilter();
     SkImageFilter::CropRect cropRect = getCropRect();
     return SkOffsetImageFilter::Make(
         SkFloatToScalar(filter->applyHorizontalScale(m_dx)),
         SkFloatToScalar(filter->applyVerticalScale(m_dy)),
         SkiaImageFilterBuilder::build(inputEffect(0), operatingColorSpace()),
         &cropRect);
 }
 
 TextStream& FEOffset::externalRepresentation(TextStream& ts, int indent) const
 {
     writeIndent(ts, indent);
     ts << "[feOffset";
     FilterEffect::externalRepresentation(ts);
     ts << " dx=\"" << dx() << "\" dy=\"" << dy() << "\"]\n";
     inputEffect(0)->externalRepresentation(ts, indent + 1);
     return ts;
 }
 
 } // namespace blink