partial switch over to sp usage of shaders

gm/bigmatrix.cpp

 /*
  * Copyright 2012 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 "SkColorPriv.h"
@@ skipping 37 matching lines @@
         uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp.getPixels());
         pixels[0] = SkPackARGB32(0xFF, 0xFF, 0x00, 0x00);
         pixels[1] = SkPackARGB32(0xFF, 0x00, 0xFF, 0x00);
         pixels[2] = SkPackARGB32(0x80, 0x00, 0x00, 0x00);
         pixels[3] = SkPackARGB32(0xFF, 0x00, 0x00, 0xFF);
         pt.set(30 * SK_Scalar1, 30 * SK_Scalar1);
         m.mapPoints(&pt, 1);
         SkMatrix s;
         s.reset();
         s.setScale(SK_Scalar1 / 1000, SK_Scalar1 / 1000);
-        SkShader* shader = SkShader::CreateBitmapShader(
-                                            bmp,
-                                            SkShader::kRepeat_TileMode,
-                                            SkShader::kRepeat_TileMode,
-                                            &s);
-        paint.setShader(shader)->unref();
+        paint.setShader(SkShader::MakeBitmapShader(bmp, SkShader::kRepeat_TileMode,
+                                                   SkShader::kRepeat_TileMode, &s));
         paint.setAntiAlias(false);
         paint.setFilterQuality(kLow_SkFilterQuality);
         rect.setLTRB(pt.fX - small, pt.fY - small,
                      pt.fX + small, pt.fY + small);
         canvas->drawRect(rect, paint);
 }