Style Change: NULL->nullptr

gm/factory.cpp

Index: gm/factory.cpp
diff --git a/gm/factory.cpp b/gm/factory.cpp
index 0a938629b9538b33da8cf14de2398d7fbbca160c..66cb65ee2430cf49fd9db01f7294c64e78aaf29a 100644
--- a/gm/factory.cpp
+++ b/gm/factory.cpp
@@ -37,7 +37,7 @@ protected:
             SkAutoTUnref<SkDiscardableMemoryPool> pool(
                 SkDiscardableMemoryPool::Create(1));
             SkAssertResult(SkInstallDiscardablePixelRef(SkImageGenerator::NewFromEncoded(data),
-                                                        NULL, &fBitmap, pool));
+                                                        nullptr, &fBitmap, pool));
         }
     }