guard rasterizer and drawlooper setters

gm/drawlooper.cpp

 /*
  * Copyright 2011 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 "SkBlurMask.h"
 #include "SkBlurMaskFilter.h"
 #include "SkCanvas.h"
 #include "SkGraphics.h"
 #include "SkLayerDrawLooper.h"
 #include "SkRandom.h"
 
 #define WIDTH   200
 #define HEIGHT  200
 
 class DrawLooperGM : public skiagm::GM {
 public:
     DrawLooperGM() : fLooper(nullptr) {
         this->setBGColor(sk_tool_utils::color_to_565(0xFFDDDDDD));
     }
 
-    virtual ~DrawLooperGM() {
-        SkSafeUnref(fLooper);
-    }
-
 protected:
     virtual SkISize onISize() override {
         return SkISize::Make(520, 160);
     }
 
     SkString onShortName() override {
         return SkString("drawlooper");
     }
 
     void onDraw(SkCanvas* canvas) override {
         this->init();
 
         SkPaint  paint;
         paint.setAntiAlias(true);
         sk_tool_utils::set_portable_typeface(&paint);
         paint.setTextSize(SkIntToScalar(72));
         paint.setLooper(fLooper);
 
         canvas->drawCircle(SkIntToScalar(50), SkIntToScalar(50),
                            SkIntToScalar(30), paint);
 
         canvas->drawRectCoords(SkIntToScalar(150), SkIntToScalar(50),
                                SkIntToScalar(200), SkIntToScalar(100), paint);
 
         canvas->drawText("Looper", 6, SkIntToScalar(230), SkIntToScalar(100),
                          paint);
     }
 
 private:
-    SkLayerDrawLooper*   fLooper;
+    sk_sp<SkDrawLooper> fLooper;
 
     void init() {
         if (fLooper) return;
 
         static const struct {
             SkColor         fColor;
             SkPaint::Style  fStyle;
             SkScalar        fWidth;
             SkScalar        fOffset;
             SkScalar        fBlur;
@@ skipping 15 matching lines @@
             SkPaint* paint = looperBuilder.addLayer(info);
             paint->setColor(gParams[i].fColor);
             paint->setStyle(gParams[i].fStyle);
             paint->setStrokeWidth(gParams[i].fWidth);
             if (gParams[i].fBlur > 0) {
                 SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
                                          SkBlurMask::ConvertRadiusToSigma(gParams[i].fBlur));
                 paint->setMaskFilter(mf)->unref();
             }
         }
-        fLooper = looperBuilder.detachLooper();
+        fLooper = looperBuilder.detach();
     }
 
     typedef GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM( return new DrawLooperGM; )