Style Change: NULL->nullptr

tests/QuickRejectTest.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkCanvas.h"
 #include "SkDrawLooper.h"
 #include "SkTypes.h"
@@ skipping 80 matching lines @@
     SkCanvas canvas(100, 100);
 
     SkRect r = SkRect::MakeWH(10, 10);
     REPORTER_ASSERT(reporter, false == canvas.quickReject(r));
 
     r.offset(300, 300);
     REPORTER_ASSERT(reporter, true == canvas.quickReject(r));
 
     // Test that saveLayer updates quickReject
     SkRect bounds = SkRect::MakeLTRB(50, 50, 70, 70);
-    canvas.saveLayer(&bounds, NULL);
+    canvas.saveLayer(&bounds, nullptr);
     REPORTER_ASSERT(reporter, true == canvas.quickReject(SkRect::MakeWH(10, 10)));
     REPORTER_ASSERT(reporter, false == canvas.quickReject(SkRect::MakeWH(60, 60)));
 }
 
 DEF_TEST(QuickReject, reporter) {
     test_drawBitmap(reporter);
     test_layers(reporter);
 }