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

Review URL: https://codereview.chromium.org/1316233002
diff --git a/src/images/SkImageEncoder_Factory.cpp b/src/images/SkImageEncoder_Factory.cpp
index 2931d12..8d4cc65 100644
--- a/src/images/SkImageEncoder_Factory.cpp
+++ b/src/images/SkImageEncoder_Factory.cpp
@@ -11,13 +11,13 @@
 template SkImageEncoder_EncodeReg* SkImageEncoder_EncodeReg::gHead;
 
 SkImageEncoder* SkImageEncoder::Create(Type t) {
-    SkImageEncoder* codec = NULL;
+    SkImageEncoder* codec = nullptr;
     const SkImageEncoder_EncodeReg* curr = SkImageEncoder_EncodeReg::Head();
     while (curr) {
-        if ((codec = curr->factory()(t)) != NULL) {
+        if ((codec = curr->factory()(t)) != nullptr) {
             return codec;
         }
         curr = curr->next();
     }
-    return NULL;
+    return nullptr;
 }