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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/gm/all_bitmap_configs.cpp b/gm/all_bitmap_configs.cpp
index 2fbd71d..4cabf2e 100644
--- a/gm/all_bitmap_configs.cpp
+++ b/gm/all_bitmap_configs.cpp
@@ -75,7 +75,7 @@
     const SkScalar D = 0.3f * SkIntToScalar(SCALE);
     const SkScalar X = SkDoubleToScalar(D * sqrt_3_over_2);
     const SkScalar Y = D * SK_ScalarHalf;
-    sk_tool_utils::set_portable_typeface(&p, NULL, SkTypeface::kBold);
+    sk_tool_utils::set_portable_typeface(&p, nullptr, SkTypeface::kBold);
     p.setTextSize(0.28125f * SCALE);
     draw_center_letter('K', &p, SK_ColorBLACK, Z, Z, canvas);
     draw_center_letter('R', &p, SK_ColorRED, Z, D, canvas);
@@ -127,7 +127,7 @@
     SkAutoTUnref<SkColorTable> ctable(new SkColorTable(pmColors, SK_ARRAY_COUNT(pmColors)));
     SkImageInfo info = SkImageInfo::Make(SCALE, SCALE, kIndex_8_SkColorType,
                                          kPremul_SkAlphaType);
-    bm.allocPixels(info, NULL, ctable);
+    bm.allocPixels(info, nullptr, ctable);
     SkAutoLockPixels autoLockPixels1(n32bitmap);
     SkAutoLockPixels autoLockPixels2(bm);
     for (int y = 0; y < SCALE; ++y) {
@@ -155,7 +155,7 @@
     SkPaint p;
     p.setColor(SK_ColorBLACK);
     p.setAntiAlias(true);
-    sk_tool_utils::set_portable_typeface(&p, NULL);
+    sk_tool_utils::set_portable_typeface(&p, nullptr);
 
     sk_tool_utils::draw_checkerboard(canvas, SK_ColorLTGRAY, SK_ColorWHITE, 8);