Remove quantization of device-space dest rect for Ganesh analytic rrect blurs

src/effects/SkBlurMaskFilter.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 "SkBlurMaskFilter.h"
 #include "SkBlurMask.h"
 #include "SkGpuBlurUtils.h"
@@ skipping 1016 matching lines @@
     if (!strokeRec.isFillStyle()) {
         return false;
     }
 
     SkScalar xformedSigma = this->computeXformedSigma(viewMatrix);
 
     sk_sp<GrFragmentProcessor> fp;
 
     SkRect rect;
     if (path.isRect(&rect)) {
-        int pad = SkScalarCeilToInt(6*xformedSigma)/2;
-        rect.outset(SkIntToScalar(pad), SkIntToScalar(pad));
+        SkScalar pad = 3.0f * xformedSigma;
+        rect.outset(pad, pad);
 
         fp = GrRectBlurEffect::Make(texProvider, rect, xformedSigma);
     } else if (path.isOval(&rect) && SkScalarNearlyEqual(rect.width(), rect.height())) {
         fp = GrCircleBlurFragmentProcessor::Make(texProvider, rect, xformedSigma);
 
         // expand the rect for the coverage geometry
         int pad = SkScalarCeilToInt(6*xformedSigma)/2;
         rect.outset(SkIntToScalar(pad), SkIntToScalar(pad));
     } else {
         return false;
@@ skipping 501 matching lines @@
     } else {
         str->append("None");
     }
     str->append("))");
 }
 #endif
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkBlurMaskFilter)
     SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkBlurMaskFilterImpl)
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END