Style Change: NULL->nullptr

bench/nanobench.h

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef nanobench_DEFINED
 #define nanobench_DEFINED
 
@@ skipping 60 matching lines @@
 
     /** Stores any pixels drawn to the screen in the bitmap.
         Returns false on error. */
     virtual bool capturePixels(SkBitmap* bmp);
 
     /** Writes any config-specific data to the log. */
     virtual void fillOptions(ResultsWriter*) { }
 
     SkCanvas* getCanvas() const {
         if (!surface.get()) {
-            return NULL;
+            return nullptr;
         }
         return surface->getCanvas();
     }
 };
 
 #endif  // nanobench_DEFINED