Style Change: NULL->nullptr
DOCS_PREVIEW= https://skia.org/?cl=1316233002

Review URL: https://codereview.chromium.org/1316233002
diff --git a/gm/drawbitmaprect.cpp b/gm/drawbitmaprect.cpp
index 2a41465..dd6d2b7 100644
--- a/gm/drawbitmaprect.cpp
+++ b/gm/drawbitmaprect.cpp
@@ -81,12 +81,12 @@
 
 static void canvasproc(SkCanvas* canvas, SkImage*, const SkBitmap& bm, const SkIRect& srcR,
                        const SkRect& dstR) {
-    canvas->drawBitmapRect(bm, srcR, dstR, NULL);
+    canvas->drawBitmapRect(bm, srcR, dstR, nullptr);
 }
 
 static void imageproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect& srcR,
                       const SkRect& dstR) {
-    canvas->drawImageRect(image, srcR, dstR, NULL);
+    canvas->drawImageRect(image, srcR, dstR, nullptr);
 }
 
 static void imagescaleproc(SkCanvas* canvas, SkImage* image, const SkBitmap&, const SkIRect& srcIR,
@@ -226,6 +226,6 @@
     typedef skiagm::GM INHERITED;
 };
 
-DEF_GM( return new DrawBitmapRectGM(canvasproc, NULL); )
+DEF_GM( return new DrawBitmapRectGM(canvasproc, nullptr); )
 DEF_GM( return new DrawBitmapRectGM(imageproc, "-imagerect"); )
 DEF_GM( return new DrawBitmapRectGM(imagescaleproc, "-imagescale"); )