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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/src/animator/SkDrawEmboss.cpp b/src/animator/SkDrawEmboss.cpp
index 70a2826..a1cd4dc 100644
--- a/src/animator/SkDrawEmboss.cpp
+++ b/src/animator/SkDrawEmboss.cpp
@@ -28,7 +28,7 @@
 
 SkMaskFilter* SkDrawEmboss::getMaskFilter() {
     if (fSigma < 0 || fDirection.count() !=3)
-        return NULL;
+        return nullptr;
     return SkBlurMaskFilter::CreateEmboss(fSigma, fDirection.begin(),
                                           fAmbient, fSpecular);
 }