use Make instead of Create to return a shared shader

gm/gm.cpp

Index: gm/gm.cpp
diff --git a/gm/gm.cpp b/gm/gm.cpp
index dc882fd646d4772644416b7625cafac154614d05..ebdc4f183c3a6b36a7cbf3898a5d088801333d10 100644
--- a/gm/gm.cpp
+++ b/gm/gm.cpp
@@ -85,10 +85,9 @@ void GM::DrawGpuOnlyMessage(SkCanvas* canvas) {
     SkMatrix localM;
     localM.setRotate(35.f);
     localM.postTranslate(10.f, 0.f);
-    SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(bmp, SkShader::kMirror_TileMode,
-                                                               SkShader::kMirror_TileMode,
-                                                               &localM));
-    paint.setShader(shader);
+    paint.setShader(SkShader::MakeBitmapShader(bmp, SkShader::kMirror_TileMode,
+                                               SkShader::kMirror_TileMode,
+                                               &localM));
     paint.setFilterQuality(kMedium_SkFilterQuality);
     canvas->drawPaint(paint);
     return;