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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/tests/GrMemoryPoolTest.cpp b/tests/GrMemoryPoolTest.cpp
index 4f53c1d..1aecce3 100644
--- a/tests/GrMemoryPoolTest.cpp
+++ b/tests/GrMemoryPoolTest.cpp
@@ -51,7 +51,7 @@
     }
 
     static void ResetAllocator() {
-        gPool.reset(NULL);
+        gPool.reset(nullptr);
     }
 
 private:
@@ -164,7 +164,7 @@
             return new E;
         default:
             // suppress warning
-            return NULL;
+            return nullptr;
     }
 }