Revert of Have GrRectBlurEffect use Linear filtering (rather than Nearest Neighbor)

src/effects/SkBlurMask.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkBlurMask.h"
@@ skipping 663 matching lines @@
     all the time, we actually fill in the profile pre-inverted
     (already done 255-x).
 
     It's the responsibility of the caller to delete the
     memory returned in profile_out.
 */
 
 uint8_t* SkBlurMask::ComputeBlurProfile(SkScalar sigma) {
     int size = SkScalarCeilToInt(6*sigma);
 
-    float center = 0.5f * size;
+    int center = size >> 1;
     uint8_t* profile = new uint8_t[size];
 
     float invr = 1.f/(2*sigma);
 
     profile[0] = 255;
     for (int x = 1 ; x < size ; ++x) {
         float scaled_x = (center - x - .5f) * invr;
         float gi = gaussianIntegral(scaled_x);
         profile[x] = 255 - (uint8_t) (255.f * gi);
     }
@@ skipping 290 matching lines @@
         (void)autoCall.detach();
     }
 
     if (style == kInner_SkBlurStyle) {
         dst->fBounds = src.fBounds; // restore trimmed bounds
         dst->fRowBytes = src.fRowBytes;
     }
 
     return true;
 }