BUG=skia:

Review URL: https://codereview.chromium.org/894693003
diff --git a/tests/ClipCacheTest.cpp b/tests/ClipCacheTest.cpp
index 2b29131..1df1053 100644
--- a/tests/ClipCacheTest.cpp
+++ b/tests/ClipCacheTest.cpp
@@ -86,7 +86,7 @@
 
     // wrap the SkClipStack in a GrClipData
     GrClipData clipData;
-    clipData.fClipStack = &stack;
+    clipData.fClipStack.reset(SkRef(&stack));
 
     SkIRect devGrClipDataBound;
     clipData.getConservativeBounds(texture,