partial switch over to sp usage of shaders

gm/bmpfilterqualityrepeat.cpp

 /*
  * Copyright 2015 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 "SkShader.h"
@@ skipping 42 matching lines @@
             SkPaint paint;
             sk_tool_utils::set_portable_typeface(&paint);
             paint.setFilterQuality(kQualities[q].fQuality);
             SkPaint bmpPaint(paint);
             SkMatrix lm = SkMatrix::I();
             lm.setScaleX(2.5);
             lm.setTranslateX(423);
             lm.setTranslateY(330);
 
             static const SkShader::TileMode kTM = SkShader::kRepeat_TileMode;
-            bmpPaint.setShader(SkShader::CreateBitmapShader(fBmp, kTM, kTM, &lm))->unref();
+            bmpPaint.setShader(SkShader::MakeBitmapShader(fBmp, kTM, kTM, &lm));
             SkRect rect = SkRect::MakeLTRB(20, 60, 220, 210);
             canvas->drawRect(rect, bmpPaint);
             paint.setAntiAlias(true);
             canvas->drawText(kQualities[q].fName, strlen(kQualities[q].fName), 20, 40, paint);
             canvas->translate(250, 0);
         }
     }
 
 private:
     SkBitmap    fBmp;
 
     typedef skiagm::GM INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 DEF_GM(return new BmpFilterQualityRepeat;)