remove fConvolutionProcs from State, and just use it locally

src/core/SkConvolver.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SK_CONVOLVER_H
 #define SK_CONVOLVER_H
 
 #include "SkSize.h"
 #include "SkTypes.h"
 #include "SkTArray.h"
@@ skipping 179 matching lines @@
 //
 // The layout in memory is assumed to be 4-bytes per pixel in B-G-R-A order
 // (this is ARGB when loaded into 32-bit words on a little-endian machine).
 SK_API void BGRAConvolve2D(const unsigned char* sourceData,
     int sourceByteRowStride,
     bool sourceHasAlpha,
     const SkConvolutionFilter1D& xfilter,
     const SkConvolutionFilter1D& yfilter,
     int outputByteRowStride,
     unsigned char* output,
-    SkConvolutionProcs* convolveProcs,
+    const SkConvolutionProcs&,
     bool useSimdIfPossible);
 
 #endif  // SK_CONVOLVER_H