guard to remove DrawBitmapRectFlags

BUG=skia:

Review URL: https://codereview.chromium.org/1235393003
diff --git a/gm/verylargebitmap.cpp b/gm/verylargebitmap.cpp
index 753786b..0dca1d7 100644
--- a/gm/verylargebitmap.cpp
+++ b/gm/verylargebitmap.cpp
@@ -45,7 +45,7 @@
 
     r.offset(SkIntToScalar(150), 0);
     // exercises extract bitmap, but not shader
-    canvas->drawBitmapRect(bm, &ir, r, NULL);
+    canvas->drawBitmapRect(bm, ir, r, NULL);
     canvas->drawRect(r, paint);
 
     r.offset(SkIntToScalar(150), 0);