use Make instead of Create to return a shared shader

samplecode/SampleAARectModes.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 43 matching lines @@
 
     SkScalar offset = SK_Scalar1 / 3;
     SkRect rect = SkRect::MakeXYWH(W / 4 + offset,
                                    H / 4 + offset,
                                    W / 2, H / 2);
     canvas->drawRect(rect, 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 AARectsModesView : public SampleView {
     SkPaint fBGPaint;
 public:
     AARectsModesView () {
-        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, "AARectsModes");
             return true;
         }
         return this->INHERITED::onQuery(evt);
@@ skipping 33 matching lines @@
     }
 
 private:
     typedef SampleView INHERITED;
 };
 
 ///////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new AARectsModesView; }
 static SkViewRegister reg(MyFactory);