Revert of more shader-->sp conversions

gm/srcmode.cpp

Index: gm/srcmode.cpp
diff --git a/gm/srcmode.cpp b/gm/srcmode.cpp
index 28bb04bd4eab70e8ab30a5c623ec448f3a87017c..86fe89bd1a4be4e843edf2d9a1ea2ad92e6e1af8 100644
--- a/gm/srcmode.cpp
+++ b/gm/srcmode.cpp
@@ -27,8 +27,10 @@
 static void gradient_paintproc(SkPaint* paint) {
     const SkColor colors[] = { SK_ColorGREEN, SK_ColorBLUE };
     const SkPoint pts[] = { { 0, 0 }, { W, H } };
-    paint->setShader(SkGradientShader::MakeLinear(pts, colors, nullptr, SK_ARRAY_COUNT(colors),
-                                                  SkShader::kClamp_TileMode));
+    SkShader* s = SkGradientShader::CreateLinear(pts, colors, nullptr,
+                                                 SK_ARRAY_COUNT(colors),
+                                                 SkShader::kClamp_TileMode);
+    paint->setShader(s)->unref();
 }
 
 typedef void (*Proc)(SkCanvas*, const SkPaint&);