Style Change: NULL->nullptr
DOCS_PREVIEW= https://skia.org/?cl=1316233002

Review URL: https://codereview.chromium.org/1316233002
diff --git a/gm/bitmapsource2.cpp b/gm/bitmapsource2.cpp
index 6c32f62..f65bafd 100644
--- a/gm/bitmapsource2.cpp
+++ b/gm/bitmapsource2.cpp
@@ -66,7 +66,7 @@
         SkPaint p;
         p.setImageFilter(filter);
 
-        canvas->saveLayer(NULL, &p);
+        canvas->saveLayer(nullptr, &p);
         canvas->restore();
     }