Style Change: NULL->nullptr

gm/colorfilters.cpp

Index: gm/colorfilters.cpp
diff --git a/gm/colorfilters.cpp b/gm/colorfilters.cpp
index 73ca7f318d20e3405a86d3e09f2617bb5cd15b2b..2d220d2c1d3ace23d7b68e71505b17f8d7ef9c8c 100644
--- a/gm/colorfilters.cpp
+++ b/gm/colorfilters.cpp
@@ -20,14 +20,14 @@ static SkShader* make_shader(const SkRect& bounds) {
         SK_ColorCYAN, SK_ColorMAGENTA, SK_ColorYELLOW,
     };
     return SkGradientShader::CreateLinear(pts,
-                                          colors, NULL, SK_ARRAY_COUNT(colors),
+                                          colors, nullptr, SK_ARRAY_COUNT(colors),
                                           SkShader::kClamp_TileMode);
 }
 
 typedef void (*InstallPaint)(SkPaint*, uint32_t, uint32_t);
 
 static void install_nothing(SkPaint* paint, uint32_t, uint32_t) {
-    paint->setColorFilter(NULL);
+    paint->setColorFilter(nullptr);
 }
 
 static void install_lighting(SkPaint* paint, uint32_t mul, uint32_t add) {