sk_sp-ify opList creation & storage

Change-Id: Idd4d81cd248ad2b2169028ac2e269a66c9cad26b
Reviewed-on: https://skia-review.googlesource.com/13400
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/src/gpu/GrTextureContext.h b/src/gpu/GrTextureContext.h
index 995ebf5..4cde61b 100644
--- a/src/gpu/GrTextureContext.h
+++ b/src/gpu/GrTextureContext.h
@@ -54,7 +54,7 @@
 
     // In MDB-mode the GrOpList can be closed by some other renderTargetContext that has picked
     // it up. For this reason, the GrOpList should only ever be accessed via 'getOpList'.
-    GrTextureOpList*             fOpList;
+    sk_sp<GrTextureOpList>       fOpList;
 
     typedef GrSurfaceContext INHERITED;
 };