Port convolve functions to SkOpts

src/core/SkBitmapScaler.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkBitmapScaler_DEFINED
 #define SkBitmapScaler_DEFINED
 
@@ skipping 23 matching lines @@
      *  specified resize-method and write the results into the pixels pointed to by dst.
      */
     static bool Resize(const SkPixmap& dst, const SkPixmap& src, ResizeMethod method);
 
     /**
      *  Helper function that manages allocating a bitmap to hold the dst pixels, and then calls
      *  the pixmap version of Resize.
      */
     static bool Resize(SkBitmap* result, const SkPixmap& src, ResizeMethod method,
                        int dest_width, int dest_height, SkBitmap::Allocator* = nullptr);
-
-     /** Platforms can also optionally overwrite the convolution functions
-        if we have SIMD versions of them.
-      */
-
-    static void PlatformConvolutionProcs(SkConvolutionProcs*);
 };
 
 #endif