Style Change: NULL->nullptr

gm/addarc.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "gm.h"
 #include "SkAnimTimer.h"
 #include "SkCanvas.h"
@@ skipping 83 matching lines @@
             SkScalar rx = SkScalarCos(rad) * R;
             SkScalar ry = SkScalarSin(rad) * R;
 
             canvas->drawLine(0, 0, rx, ry, paint);
 
             SkPath path;
             path.addArc(oval, 0, deg);
             SkPathMeasure meas(path, false);
             SkScalar arcLen = rad * R;
             SkPoint pos;
-            if (meas.getPosTan(arcLen, &pos, NULL)) {
+            if (meas.getPosTan(arcLen, &pos, nullptr)) {
                 canvas->drawLine(0, 0, pos.x(), pos.y(), measPaint);
             }
         }
     }
 
 private:
     typedef skiagm::GM INHERITED;
 };
 DEF_GM( return new AddArcMeasGM; )
 
@@ skipping 109 matching lines @@
             canvas->restore();
             canvas->translate(0, 40);
         }
     }
     
 private:
     typedef skiagm::GM INHERITED;
 };
 DEF_GM( return new ManyArcsGM; )