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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/src/utils/SkOSFile.cpp b/src/utils/SkOSFile.cpp
index cb12c2b..a0c003b 100644
--- a/src/utils/SkOSFile.cpp
+++ b/src/utils/SkOSFile.cpp
@@ -20,7 +20,7 @@
         return SkString();
     }
     const char* filename = strrchr(fullPath, SkPATH_SEPARATOR);
-    if (NULL == filename) {
+    if (nullptr == filename) {
         filename = fullPath;
     } else {
         ++filename;
@@ -33,7 +33,7 @@
         return SkString();
     }
     const char* end = strrchr(fullPath, SkPATH_SEPARATOR);
-    if (NULL == end) {
+    if (nullptr == end) {
         return SkString();
     }
     if (end == fullPath) {