use Make instead of Create to return a shared shader

samplecode/SampleRegion.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"
 #include "SkGradientShader.h"
 #include "SkPath.h"
 #include "SkRegion.h"
 #include "SkShader.h"
 #include "SkUtils.h"
 #include "SkImageDecoder.h"
 
@@ skipping 54 matching lines @@
     const SkPoint pts[] = {
         { bounds.fLeft, y },
         { bounds.fRight, y }
     };
     const SkColor colors[] = { SK_ColorBLACK, SK_ColorBLACK, 0 };
 
     // pos[1] value is where we start to fade, relative to the width
     // of our pts[] array.
     const SkScalar pos[] = { 0, 0.9f, SK_Scalar1 };
 
-    SkShader* s = SkGradientShader::CreateLinear(pts, colors, pos, 3,
-                                                 SkShader::kClamp_TileMode);
     SkPaint p;
-    p.setShader(s)->unref();
+    p.setShader(SkGradientShader::MakeLinear(pts, colors, pos, 3, SkShader::kClamp_TileMode));
     p.setXfermodeMode(SkXfermode::kDstIn_Mode);
     canvas->drawRect(bounds, p);
 
     canvas->restore();
 }
 
 static void test_text(SkCanvas* canvas) {
     SkPaint paint;
     paint.setAntiAlias(true);
     paint.setTextSize(20);
 
     const char* str = "Hamburgefons";
     size_t len = strlen(str);
     SkScalar x = 20;
     SkScalar y = 20;
 
     canvas->drawText(str, len, x, y, paint);
 
     y += 20;
 
     const SkPoint pts[] = { { x, y }, { x + paint.measureText(str, len), y } };
     const SkColor colors[] = { SK_ColorBLACK, SK_ColorBLACK, 0 };
     const SkScalar pos[] = { 0, 0.9f, 1 };
-    SkShader* s = SkGradientShader::CreateLinear(pts, colors, pos,
+    paint.setShader(SkGradientShader::MakeLinear(pts, colors, pos,
                                                  SK_ARRAY_COUNT(colors),
-                                                 SkShader::kClamp_TileMode);
-    paint.setShader(s)->unref();
+                                                 SkShader::kClamp_TileMode));
     canvas->drawText(str, len, x, y, paint);
 
     y += 20;
     paint.setShader(nullptr);
     drawFadingText(canvas, str, len, x, y, paint);
 }
 
 #ifdef SK_DEBUG
 static void make_rgn(SkRegion* rgn, int left, int top, int right, int bottom,
                      int count, int32_t runs[]) {
@@ skipping 283 matching lines @@
 private:
     SkIRect    fBase, fRect;
 
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() { return new RegionView; }
 static SkViewRegister reg(MyFactory);