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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/src/gpu/GrReducedClip.cpp b/src/gpu/GrReducedClip.cpp
index ca97098..137c83e 100644
--- a/src/gpu/GrReducedClip.cpp
+++ b/src/gpu/GrReducedClip.cpp
@@ -34,7 +34,7 @@
     int numAAElements = 0;
     while ((kUnknown_InitialState == *initialState)) {
         const Element* element = iter.prev();
-        if (NULL == element) {
+        if (nullptr == element) {
             *initialState = GrReducedClip::kAllIn_InitialState;
             break;
         }