use Make instead of Create to return a shared shader

samplecode/SampleQuadStroker.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 "sk_tool_utils.h"
 #include "SampleCode.h"
 #include "SkView.h"
@@ skipping 91 matching lines @@
     enum {
         kCount = 18
     };
     SkPoint fPts[kCount];
     SkRect fWeightControl;
     SkRect fRadiusControl;
     SkRect fErrorControl;
     SkRect fWidthControl;
     SkRect fBounds;
     SkMatrix fMatrix, fInverse;
-    SkAutoTUnref<SkShader> fShader;
+    sk_sp<SkShader> fShader;
     SkAutoTUnref<SkSurface> fMinSurface;
     SkAutoTUnref<SkSurface> fMaxSurface;
     StrokeTypeButton fCubicButton;
     StrokeTypeButton fConicButton;
     StrokeTypeButton fQuadButton;
     StrokeTypeButton fArcButton;
     StrokeTypeButton fRRectButton;
     CircleTypeButton fCircleButton;
     StrokeTypeButton fTextButton;
     SkString fText;
@@ skipping 134 matching lines @@
             SkScalar x = SkIntToScalar(ix * fZoom);
             canvas->drawLine(x - SK_ScalarHalf, 0, x - SK_ScalarHalf, 999, paint);
         }
     }
 
    void setWHZ(int width, int height, int zoom) {
         fZoom = zoom;
         fBounds.set(0, 0, SkIntToScalar(width * zoom), SkIntToScalar(height * zoom));
         fMatrix.setScale(SkIntToScalar(zoom), SkIntToScalar(zoom));
         fInverse.setScale(SK_Scalar1 / zoom, SK_Scalar1 / zoom);
-        fShader.reset(sk_tool_utils::create_checkerboard_shader(
-                              0xFFCCCCCC, 0xFFFFFFFF, zoom));
+        fShader = sk_tool_utils::create_checkerboard_shader(0xFFCCCCCC, 0xFFFFFFFF, zoom);
 
         SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
         fMinSurface.reset(SkSurface::NewRaster(info));
         info = info.makeWH(width * zoom, height * zoom);
         fMaxSurface.reset(SkSurface::NewRaster(info));
     }
 
     void draw_points(SkCanvas* canvas, const SkPath& path, SkColor color,
                      bool show_lines) {
         SkPaint paint;
@@ skipping 514 matching lines @@
     }
 
 private:
     typedef SkView INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static SkView* F2() { return new QuadStrokerView; }
 static SkViewRegister gR2(F2);