partial switch over to sp usage of shaders

gm/colorfilters.cpp

 /*
  * Copyright 2014 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 "SkCanvas.h"
 #include "SkColorMatrixFilter.h"
 #include "SkGradientShader.h"
 
-static SkShader* make_shader(const SkRect& bounds) {
+static sk_sp<SkShader> make_shader(const SkRect& bounds) {
     const SkPoint pts[] = {
         { bounds.left(), bounds.top() },
         { bounds.right(), bounds.bottom() },
     };
     const SkColor colors[] = {
         SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, SK_ColorBLACK,
         SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW,
     };
-    return SkGradientShader::CreateLinear(pts,
-                                          colors, nullptr, SK_ARRAY_COUNT(colors),
-                                          SkShader::kClamp_TileMode);
+    return SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
+                                        SkShader::kClamp_TileMode);
 }
 
 typedef void (*InstallPaint)(SkPaint*, uint32_t, uint32_t);
 
 static void install_nothing(SkPaint* paint, uint32_t, uint32_t) {
     paint->setColorFilter(nullptr);
 }
 
 static void install_lighting(SkPaint* paint, uint32_t mul, uint32_t add) {
     paint->setColorFilter(SkColorMatrixFilter::CreateLightingFilter(mul, add))->unref();
@@ skipping 11 matching lines @@
     }
 
     virtual SkISize onISize() override {
         return SkISize::Make(640, 480);
     }
 
     void onDraw(SkCanvas* canvas) override {
         SkPaint paint;
         SkRect r;
         r.setWH(600, 50);
-        paint.setShader(make_shader(r))->unref();
+        paint.setShader(make_shader(r));
 
         const struct {
             InstallPaint    fProc;
             uint32_t        fData0, fData1;
         } rec[] = {
             { install_nothing, 0, 0 },
             { install_lighting, 0xFF0000, 0 },
             { install_lighting, 0x00FF00, 0 },
             { install_lighting, 0x0000FF, 0 },
             { install_lighting, 0x000000, 0xFF0000 },
@@ skipping 11 matching lines @@
 
 private:
     SkString fName;
     typedef GM INHERITED;
 };
 
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new ColorFiltersGM;)