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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/src/images/SkImageDecoder_libbmp.cpp b/src/images/SkImageDecoder_libbmp.cpp
index 3884508..1791623 100644
--- a/src/images/SkImageDecoder_libbmp.cpp
+++ b/src/images/SkImageDecoder_libbmp.cpp
@@ -48,7 +48,7 @@
     if (is_bmp(stream)) {
         return new SkBMPImageDecoder;
     }
-    return NULL;
+    return nullptr;
 }
 
 static SkImageDecoder_DecodeReg gReg(sk_libbmp_dfactory);
@@ -74,7 +74,7 @@
         fWidth = width;
         fHeight = height;
         if (fJustBounds) {
-            return NULL;
+            return nullptr;
         }
 
         fRGB.setCount(width * height * 3);  // 3 == r, g, b
@@ -139,7 +139,7 @@
         return kSuccess;
     }
 
-    if (!this->allocPixelRef(bm, NULL)) {
+    if (!this->allocPixelRef(bm, nullptr)) {
         return kFailure;
     }