switch xfermodes over to sk_sp

gm/avoidxfermode.cpp

 /*
  * Copyright 2016 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "Resources.h"
 
@@ skipping 19 matching lines @@
     }
 
     void onDraw(SkCanvas* canvas) override {
         canvas->drawBitmap(fBM, 0, 0);
 
         SkRect r = SkRect::MakeIWH(64, 64);
 
         // UL corner: replace white with black with a tight tolerance
         SkPaint p1;
         p1.setColor(SK_ColorBLACK);
-        p1.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE,
-                                               5,
-                                               SkAvoidXfermode::kTargetColor_Mode))->unref();
+        p1.setXfermode(SkAvoidXfermode::Make(SK_ColorWHITE, 5, SkAvoidXfermode::kTargetColor_Mode));
 
         canvas->drawRect(r, p1);
 
         r.offsetTo(64, 0.0f);
 
         // UR corner: draw black everywhere except white with a tight tolerance
         SkPaint p2;
         p2.setColor(SK_ColorBLACK);
-        p2.setXfermode(SkAvoidXfermode::Create(SK_ColorWHITE,
-                                               250,
-                                               SkAvoidXfermode::kAvoidColor_Mode))->unref();
+        p2.setXfermode(SkAvoidXfermode::Make(SK_ColorWHITE, 250,
+                                             SkAvoidXfermode::kAvoidColor_Mode));
 
         canvas->drawRect(r, p2);
 
         r.offsetTo(0.0f, 64);
 
         // LL corner: replace red with transparent blue with a loose tolerance
         SkPaint p3;
         p3.setColor(0x7F0000FF);
-        p3.setXfermode(SkAvoidXfermode::Create(SK_ColorRED,
-                                               250,
-                                               SkAvoidXfermode::kTargetColor_Mode))->unref();
+        p3.setXfermode(SkAvoidXfermode::Make(SK_ColorRED, 250, SkAvoidXfermode::kTargetColor_Mode));
 
         canvas->drawRect(r, p3);
 
         r.offsetTo(64, 64);
 
         // LR corner: draw black everywhere except red with a loose tolerance
         SkPaint p4;
         p4.setColor(SK_ColorBLACK);
-        p4.setXfermode(SkAvoidXfermode::Create(SK_ColorRED,
-                                               5,
-                                               SkAvoidXfermode::kAvoidColor_Mode))->unref();
+        p4.setXfermode(SkAvoidXfermode::Make(SK_ColorRED, 5, SkAvoidXfermode::kAvoidColor_Mode));
 
         canvas->drawRect(r, p4);
     }
 
 private:
     SkBitmap fBM;
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new AvoidXfermodeGM;)