Revert 102385 - Use Skia's implementation of Gaussian blur when accelerated filters

Source/WebCore/platform/graphics/filters/FEGaussianBlur.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) 2010 Igalia, S.L.
  * 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
@@ skipping 255 matching lines @@
     calculateKernelSize(filter(), kernelSizeX, kernelSizeY, m_stdX, m_stdY);
 
     // We take the half kernel size and multiply it with three, because we run box blur three times.
     absolutePaintRect.inflateX(3 * kernelSizeX * 0.5f);
     absolutePaintRect.inflateY(3 * kernelSizeY * 0.5f);
     setAbsolutePaintRect(enclosingIntRect(absolutePaintRect));
 }
 
 void FEGaussianBlur::platformApplySoftware()
 {
-#if USE(SKIA)
-    if (filter()->renderingMode() == Accelerated) {
-        platformApplySkia();
-        return;
-    }
-#endif
-
     FilterEffect* in = inputEffect(0);
 
     ByteArray* srcPixelArray = createPremultipliedImageResult();
     if (!srcPixelArray)
         return;
 
     setIsAlphaImage(in->isAlphaImage());
 
     IntRect effectDrawingRect = requestedRegionOfInputImageData(in->absolutePaintRect());
     in->copyPremultipliedImage(srcPixelArray, effectDrawingRect);
@@ skipping 28 matching lines @@
 
 float FEGaussianBlur::calculateStdDeviation(float radius)
 {
     // Blur radius represents 2/3 times the kernel size, the dest pixel is half of the radius applied 3 times
     return max((radius * 2 / 3.f - 0.5f) / gaussianKernelFactor(), 0.f);
 }
 
 } // namespace WebCore
 
 #endif // ENABLE(FILTERS)