Style Change: NULL->nullptr

gm/dcshader.cpp

Index: gm/dcshader.cpp
diff --git a/gm/dcshader.cpp b/gm/dcshader.cpp
index e0cb2d714f983903bdd61b4197c3f8b31ae0121e..3eee43d1474cb058c336bdf770550cd870049cc7 100644
--- a/gm/dcshader.cpp
+++ b/gm/dcshader.cpp
@@ -226,7 +226,7 @@ protected:
     void onDraw(SkCanvas* canvas) override {
         // This GM exists to test a specific feature of the GPU backend. It does not work with the
         // sw rasterizer, tile modes, etc.
-        if (NULL == canvas->getGrContext()) {
+        if (nullptr == canvas->getGrContext()) {
             this->drawGpuOnlyMessage(canvas);
             return;
         }