Style Change: NULL->nullptr

gm/imagefilters.cpp

Index: gm/imagefilters.cpp
diff --git a/gm/imagefilters.cpp b/gm/imagefilters.cpp
index 54e50e47f2dc0d98dcabbcc6815f4a4466405b2b..e28bf5255ec754c95b95ac5c03a7d8dbb7b40623 100644
--- a/gm/imagefilters.cpp
+++ b/gm/imagefilters.cpp
@@ -31,7 +31,7 @@ protected:
         // want to force a layer, so modes like DstIn can combine meaningfully, but the final
         // image can still be shown against our default (opaque) background. non-opaque GMs
         // are a lot more trouble to compare/triage.
-        canvas->saveLayer(NULL, NULL);
+        canvas->saveLayer(nullptr, nullptr);
         canvas->drawColor(SK_ColorGREEN);
 
         SkPaint paint;
@@ -62,7 +62,7 @@ protected:
         
         for (size_t i = 0; i < SK_ARRAY_COUNT(modes); ++i) {
             canvas->save();
-            this->doDraw(canvas, modes[i], NULL);
+            this->doDraw(canvas, modes[i], nullptr);
             canvas->translate(240, 0);
             this->doDraw(canvas, modes[i], imf);
             canvas->restore();