partial switch over to sp usage of shaders

gm/clippedbitmapshaders.cpp

 /*
  * Copyright 2013 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 "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 64 matching lines @@
     virtual SkISize onISize() {
         return SkISize::Make(300, 300);
     }
 
     virtual void onDraw(SkCanvas* canvas) {
         SkBitmap bmp = create_bitmap();
         SkMatrix s;
         s.reset();
         s.setScale(8, 8);
         s.postTranslate(SLIDE_SIZE / 2, SLIDE_SIZE / 2);
-        SkShader* shader = SkShader::CreateBitmapShader(
-                bmp, fMode, fMode, &s);
-
         SkPaint paint;
-        paint.setShader(shader)->unref();
+        paint.setShader(SkShader::MakeBitmapShader(bmp, fMode, fMode, &s));
 
         if (fHQ) {
             paint.setFilterQuality(kHigh_SkFilterQuality);
         }
 
         SkScalar margin = (SLIDE_SIZE / 3 - RECT_SIZE) / 2;
         for (int i = 0; i < 3; i++) {
             SkScalar yOrigin = SLIDE_SIZE / 3 * i + margin;
             for (int j = 0; j < 3; j++) {
                 SkScalar xOrigin = SLIDE_SIZE / 3 * j + margin;
@@ skipping 19 matching lines @@
 DEF_GM( return new ClippedBitmapShadersGM(SkShader::kRepeat_TileMode); )
 DEF_GM( return new ClippedBitmapShadersGM(SkShader::kMirror_TileMode); )
 DEF_GM( return new ClippedBitmapShadersGM(SkShader::kClamp_TileMode); )
 
 DEF_GM( return new ClippedBitmapShadersGM(SkShader::kRepeat_TileMode, true); )
 DEF_GM( return new ClippedBitmapShadersGM(SkShader::kMirror_TileMode, true); )
 DEF_GM( return new ClippedBitmapShadersGM(SkShader::kClamp_TileMode, true); )
 
 
 }