Remove overly-promiscuous SkNx syntax sugar.

src/effects/gradients/SkRadialGradient.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkRadialGradient.h"
 #include "SkRadialGradient_Table.h"
@@ skipping 302 matching lines @@
         const Sk4f dy4(sdy * 4);
 
         Sk4f tmpxy = fx4 * dx4 + fy4 * dy4;
         Sk4f tmpdxdy = sum_squares(dx4, dy4);
         Sk4f R = sum_squares(fx4, fy4);
         Sk4f dR = tmpxy + tmpxy + tmpdxdy;
         const Sk4f ddR = tmpdxdy + tmpdxdy;
 
         for (int i = 0; i < (count >> 2); ++i) {
             Sk4f dist = Sk4f::Min(fast_sqrt(R), max);
-            R += dR;
-            dR += ddR;
+            R = R + dR;
+            dR = dR + ddR;
 
             int fi[4];
             dist.castTrunc().store(fi);
 
             for (int i = 0; i < 4; i++) {
                 *dstC++ = cache[toggle + fi[i]];
                 toggle = next_dither_toggle(toggle);
             }
         }
         count &= 3;
@@ skipping 252 matching lines @@
     str->appendScalar(fCenter.fY);
     str->append(") radius: ");
     str->appendScalar(fRadius);
     str->append(" ");
 
     this->INHERITED::toString(str);
 
     str->append(")");
 }
 #endif