use Make instead of Create to return a shared shader

samplecode/SampleHairModes.cpp

Index: samplecode/SampleHairModes.cpp
diff --git a/samplecode/SampleHairModes.cpp b/samplecode/SampleHairModes.cpp
index ae41aa9c9d321f6c53aa6a3e229472586d5a3197..085581cfc958817da68e118b3ad7c6298da670d6 100644
--- a/samplecode/SampleHairModes.cpp
+++ b/samplecode/SampleHairModes.cpp
@@ -60,7 +60,7 @@ static SkScalar drawCell(SkCanvas* canvas, SkXfermode* mode, SkAlpha a0, SkAlpha
     return H;
 }
 
-static SkShader* make_bg_shader() {
+static sk_sp<SkShader> make_bg_shader() {
     SkBitmap bm;
     bm.allocN32Pixels(2, 2);
     *bm.getAddr32(0, 0) = *bm.getAddr32(1, 1) = 0xFFFFFFFF;
@@ -69,17 +69,15 @@ static SkShader* make_bg_shader() {
     SkMatrix m;
     m.setScale(SkIntToScalar(6), SkIntToScalar(6));
 
-    return SkShader::CreateBitmapShader(bm,
-                                        SkShader::kRepeat_TileMode,
-                                        SkShader::kRepeat_TileMode,
-                                        &m);
+    return SkShader::MakeBitmapShader(bm, SkShader::kRepeat_TileMode,
+                                      SkShader::kRepeat_TileMode, &m);
 }
 
 class HairModesView : public SampleView {
     SkPaint fBGPaint;
 public:
     HairModesView() {
-        fBGPaint.setShader(make_bg_shader())->unref();
+        fBGPaint.setShader(make_bg_shader());
     }
 
 protected: