more shader-->sp conversions

tests/PictureShaderTest.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkPicture.h"
 #include "SkPictureRecorder.h"
 #include "SkShader.h"
 #include "Test.h"
 
 // Test that attempting to create a picture shader with a nullptr picture or
 // empty picture returns a shader that draws nothing.
 DEF_TEST(PictureShader_empty, reporter) {
     SkPaint paint;
 
     SkBitmap bitmap;
     bitmap.allocN32Pixels(1,1);
 
     SkCanvas canvas(bitmap);
     canvas.clear(SK_ColorGREEN);
 
-    SkShader* shader = SkShader::CreatePictureShader(
-            nullptr, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, nullptr, nullptr);
-    paint.setShader(shader)->unref();
+    paint.setShader(SkShader::MakePictureShader(
+            nullptr, SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, nullptr, nullptr));
 
     canvas.drawRect(SkRect::MakeWH(1,1), paint);
     REPORTER_ASSERT(reporter, *bitmap.getAddr32(0,0) == SK_ColorGREEN);
 
 
     SkPictureRecorder factory;
     factory.beginRecording(0, 0, nullptr, 0);
-    SkAutoTUnref<SkPicture> picture(factory.endRecording());
-    shader = SkShader::CreatePictureShader(
-            picture.get(), SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, nullptr, nullptr);
-    paint.setShader(shader)->unref();
+    sk_sp<SkPicture> picture(factory.endRecording());
+    paint.setShader(SkShader::MakePictureShader(std::move(picture), SkShader::kClamp_TileMode,
+                                                SkShader::kClamp_TileMode, nullptr, nullptr));
 
     canvas.drawRect(SkRect::MakeWH(1,1), paint);
     REPORTER_ASSERT(reporter, *bitmap.getAddr32(0,0) == SK_ColorGREEN);
 }