switch xfermodes over to sk_sp

tests/BlendTest.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 #include "SkColor.h"
 #include "SkColorPriv.h"
@@ skipping 62 matching lines @@
     if (!r->allowExtendedTest()) {
         return;
     }
 
     // No matter what xfermode we use, premul inputs should create premul outputs.
     auto test_mode = [&](int m) {
         SkXfermode::Mode mode = (SkXfermode::Mode)m;
         if (mode == SkXfermode::kSrcOver_Mode) {
             return;  // TODO: can't create a SrcOver xfermode.
         }
-        SkAutoTUnref<SkXfermode> xfermode(SkXfermode::Create(mode));
+        auto xfermode(SkXfermode::Make(mode));
         SkASSERT(xfermode);
         // We'll test all alphas and legal color values, assuming all colors work the same.
         // This is not true for non-separable blend modes, but this test still can't hurt.
         for (int sa = 0; sa <= 255; sa++) {
         for (int da = 0; da <= 255; da++) {
         for (int  s = 0;  s <= sa;   s++) {
         for (int  d = 0;  d <= da;   d++) {
             SkPMColor src = SkPackARGB32(sa, s, s, s),
                       dst = SkPackARGB32(da, d, d, d);
             xfermode->xfer32(&dst, &src, 1, nullptr);  // To keep it simple, no AA.
             if (!SkPMColorValid(dst)) {
                 ERRORF(r, "%08x is not premul using %s", dst, SkXfermode::ModeName(mode));
             }
         }}}}
     };
 
     // Parallelism helps speed things up on my desktop from ~725s to ~50s.
     SkTaskGroup().batch(SkXfermode::kLastMode, test_mode);
 }