Fix memory leak

src/gpu/GrPathRenderingDrawContext.h

Index: src/gpu/GrPathRenderingDrawContext.h
diff --git a/src/gpu/GrPathRenderingDrawContext.h b/src/gpu/GrPathRenderingDrawContext.h
index ab36955ae07760559773c4b81ff55d8d337a6981..49a0e1d3c54de77796a61c9bd24171e401c85127 100644
--- a/src/gpu/GrPathRenderingDrawContext.h
+++ b/src/gpu/GrPathRenderingDrawContext.h
@@ -29,11 +29,10 @@ protected:
     GrPathRenderingDrawContext(GrContext* ctx, GrDrawingManager* mgr, GrRenderTarget* rt,
                                const SkSurfaceProps* surfaceProps, GrAuditTrail* at,
                                GrSingleOwner* so)
-        : INHERITED(ctx, mgr, rt, surfaceProps, at, so)
-        , fStencilAndCoverTextContext(nullptr) {}
+        : INHERITED(ctx, mgr, rt, surfaceProps, at, so) {}
 
 private:
-    GrStencilAndCoverTextContext* fStencilAndCoverTextContext;
+    SkAutoTDelete<GrStencilAndCoverTextContext> fStencilAndCoverTextContext;
 
     friend class GrDrawingManager; // for ctor