Style Change: NULL->nullptr

src/gpu/effects/GrYUVtoRGBEffect.cpp

Index: src/gpu/effects/GrYUVtoRGBEffect.cpp
diff --git a/src/gpu/effects/GrYUVtoRGBEffect.cpp b/src/gpu/effects/GrYUVtoRGBEffect.cpp
index 84be8c3b4fcddf27fb2867100f0ed2f1483c05e0..ba975f7c02ec68ceb93301e9553079a9aa2ab4b9 100644
--- a/src/gpu/effects/GrYUVtoRGBEffect.cpp
+++ b/src/gpu/effects/GrYUVtoRGBEffect.cpp
@@ -64,7 +64,7 @@ public:
         virtual void emitCode(EmitArgs& args) override {
             GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
 
-            const char* yuvMatrix   = NULL;
+            const char* yuvMatrix   = nullptr;
             fMatrixUni = args.fBuilder->addUniform(GrGLProgramBuilder::kFragment_Visibility,
                                              kMat44f_GrSLType, kDefault_GrSLPrecision,
                                              "YUVMatrix", &yuvMatrix);