Style Change: NULL->nullptr

src/ports/SkTLS_pthread.cpp

Index: src/ports/SkTLS_pthread.cpp
diff --git a/src/ports/SkTLS_pthread.cpp b/src/ports/SkTLS_pthread.cpp
index 4264890217a6cf1e6cd8250363e89ad172354f7c..ac558a81965bedfb7a22a6bac8d001181c9eb1b4 100644
--- a/src/ports/SkTLS_pthread.cpp
+++ b/src/ports/SkTLS_pthread.cpp
@@ -18,7 +18,7 @@ static void sk_tls_make_key() {
 
 void* SkTLS::PlatformGetSpecific(bool forceCreateTheSlot) {
     // should we use forceCreateTheSlot to potentially skip calling pthread_once
-    // and just return NULL if we've never been called with
+    // and just return nullptr if we've never been called with
     // forceCreateTheSlot==true ?
 
     (void)pthread_once(&gSkTLSKey_Once, sk_tls_make_key);