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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/samplecode/SampleFilterFuzz.cpp b/samplecode/SampleFilterFuzz.cpp
index bae7c21..ca4b8e2 100644
--- a/samplecode/SampleFilterFuzz.cpp
+++ b/samplecode/SampleFilterFuzz.cpp
@@ -39,7 +39,7 @@
 //#define SK_ADD_RANDOM_BIT_FLIPS
 //#define SK_FUZZER_IS_VERBOSE
 
-static const uint32_t kSeed = (uint32_t)(time(NULL));
+static const uint32_t kSeed = (uint32_t)(time(nullptr));
 static SkRandom gRand(kSeed);
 static bool return_large = false;
 static bool return_undef = false;
@@ -245,7 +245,7 @@
 
     canvas->save();
     canvas->scale(0.5f, 0.5f);
-    canvas->drawBitmap(make_bitmap(), 0, 0, NULL);
+    canvas->drawBitmap(make_bitmap(), 0, 0, nullptr);
     canvas->restore();
 
     paint.setAntiAlias(true);
@@ -260,7 +260,7 @@
 static SkImageFilter* make_image_filter(bool canBeNull = true) {
     SkImageFilter* filter = 0;
 
-    // Add a 1 in 3 chance to get a NULL input
+    // Add a 1 in 3 chance to get a nullptr input
     if (canBeNull && (R(3) == 1)) { return filter; }
 
     enum { ALPHA_THRESHOLD, MERGE, COLOR, LUT3D, BLUR, MAGNIFIER,
@@ -380,7 +380,7 @@
     case DROP_SHADOW:
         filter = SkDropShadowImageFilter::Create(make_scalar(), make_scalar(), make_scalar(true),
                     make_scalar(true), make_color(), make_shadow_mode(), make_image_filter(),
-                    NULL);
+                    nullptr);
         break;
     case MORPHOLOGY:
         if (R(2) == 1) {