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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/tests/HashTest.cpp b/tests/HashTest.cpp
index f53faaf..c90c377 100644
--- a/tests/HashTest.cpp
+++ b/tests/HashTest.cpp
@@ -94,7 +94,7 @@
 
 class CopyCounter {
 public:
-    CopyCounter() : fID(0), fCounter(NULL) {}
+    CopyCounter() : fID(0), fCounter(nullptr) {}
 
     CopyCounter(uint32_t id, uint32_t* counter) : fID(id), fCounter(counter) {}