use Make instead of Create to return a shared shader

src/animator/SkDrawShader.cpp

Index: src/animator/SkDrawShader.cpp
diff --git a/src/animator/SkDrawShader.cpp b/src/animator/SkDrawShader.cpp
index 9e3becc48b94cc23947aac7b25fdcc504340bb6c..2868b9f4efe7c76c891e338eede568fb1eac8a00 100644
--- a/src/animator/SkDrawShader.cpp
+++ b/src/animator/SkDrawShader.cpp
@@ -71,8 +71,8 @@ SkShader* SkDrawBitmapShader::getShader() {
     //
     // oops, bitmapshader no longer takes filterBitmap, but deduces it at
     // draw-time from the paint
-    return SkShader::CreateBitmapShader(image->fBitmap,
+    return SkShader::MakeBitmapShader(image->fBitmap,
                                         (SkShader::TileMode) tileMode,
                                         (SkShader::TileMode) tileMode,
-                                        getMatrix());
+                                        getMatrix()).release();
 }