use Make instead of Create to return a shared shader

src/core/SkBitmapDevice.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 "SkBitmapDevice.h"
 #include "SkConfig8888.h"
 #include "SkDraw.h"
@@ skipping 296 matching lines @@
     } else {
         USE_DRAWBITMAP:
         // We can go faster by just calling drawBitmap, which will concat the
         // matrix with the CTM, and try to call drawSprite if it can. If not,
         // it will make a shader and call drawRect, as we do below.
         draw.drawBitmap(*bitmapPtr, matrix, dstPtr, paint);
         return;
     }
 
     // construct a shader, so we can call drawRect with the dst
-    SkShader* s = SkShader::CreateBitmapShader(*bitmapPtr,
-                                               SkShader::kClamp_TileMode,
-                                               SkShader::kClamp_TileMode,
-                                               &matrix);
-    if (nullptr == s) {
+    auto s = SkShader::MakeBitmapShader(*bitmapPtr, SkShader::kClamp_TileMode,
+                                        SkShader::kClamp_TileMode, &matrix);
+    if (!s) {
         return;
     }
 
     SkPaint paintWithShader(paint);
     paintWithShader.setStyle(SkPaint::kFill_Style);
-    paintWithShader.setShader(s)->unref();
+    paintWithShader.setShader(s);

[f(malita), 2016/03/08 15:50:35]

setShader(std::move(s))

[reed1, 2016/03/08 20:17:15]

Done.

 
     // Call ourself, in case the subclass wanted to share this setup code
     // but handle the drawRect code themselves.
     this->drawRect(draw, *dstPtr, paintWithShader);
 }
 
 void SkBitmapDevice::drawSprite(const SkDraw& draw, const SkBitmap& bitmap,
                                 int x, int y, const SkPaint& paint) {
     draw.drawSprite(bitmap, x, y, paint);
 }
@@ skipping 41 matching lines @@
         paint.getRasterizer() ||
         paint.getPathEffect() ||
         paint.isFakeBoldText() ||
         paint.getStyle() != SkPaint::kFill_Style ||
         !SkXfermode::IsMode(paint.getXfermode(), SkXfermode::kSrcOver_Mode))
     {
         return true;
     }
     return false;
 }