Style Change: NULL->nullptr

src/gpu/glsl/GrGLSL.h

Index: src/gpu/glsl/GrGLSL.h
diff --git a/src/gpu/glsl/GrGLSL.h b/src/gpu/glsl/GrGLSL.h
index efe31fe2dd051ad3ecfbda2a7154ae7956e4b868..87b3d2daa4afba9801c7b5fcc0b4202276ed296b 100644
--- a/src/gpu/glsl/GrGLSL.h
+++ b/src/gpu/glsl/GrGLSL.h
@@ -135,7 +135,7 @@ protected:
      * Argument expr is a simple expression or a parenthesized expression. */
     // TODO: make explicit once effects input Exprs.
     GrGLSLExpr(const char expr[]) {
-        if (NULL == expr) {  // TODO: remove this once effects input Exprs.
+        if (nullptr == expr) {  // TODO: remove this once effects input Exprs.
             fType = kOnes_ExprType;
         } else {
             fType = kFullExpr_ExprType;