use Make instead of Create to return a shared shader

samplecode/SampleHairModes.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 "SampleCode.h"
 #include "SkView.h"
 #include "SkCanvas.h"
@@ skipping 42 matching lines @@
     for (int angle = 0; angle < 24; ++angle) {
         SkScalar x = SkScalarCos(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gWidth;
         SkScalar y = SkScalarSin(SkIntToScalar(angle) * (SK_ScalarPI * 2) / 24) * gHeight;
         paint.setStrokeWidth(SK_Scalar1 * angle * 2 / 24);
         canvas->drawLine(W/2, H/2, W/2 + x, H/2 + y, paint);
     }
 
     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;
     *bm.getAddr32(1, 0) = *bm.getAddr32(0, 1) = SkPackARGB32(0xFF, 0xCC, 0xCC, 0xCC);
 
     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:
     // overrides from SkEventSink
     virtual bool onQuery(SkEvent* evt) {
         if (SampleCode::TitleQ(*evt)) {
             SampleCode::TitleR(evt, "HairlineModes");
             return true;
         }
         return this->INHERITED::onQuery(evt);
@@ skipping 33 matching lines @@
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new HairModesView; }
 static SkViewRegister reg(MyFactory);