Remove base::Value::CreateNullValue

chrome/browser/ui/webui/settings/about_handler.cc

Index: chrome/browser/ui/webui/settings/about_handler.cc
diff --git a/chrome/browser/ui/webui/settings/about_handler.cc b/chrome/browser/ui/webui/settings/about_handler.cc
index 78fd9d97d62e190ae6083663e6d2b71901e784e2..0cb97e73f7766716437001a0277b08c7179beb13 100644
--- a/chrome/browser/ui/webui/settings/about_handler.cc
+++ b/chrome/browser/ui/webui/settings/about_handler.cc
@@ -17,6 +17,7 @@
 #include "base/i18n/message_formatter.h"
 #include "base/location.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
@@ -574,9 +575,9 @@ void AboutHandler::SetUpdateStatus(VersionUpdater::Status status,
     if (!types_msg.empty())
       event->SetString("connectionTypes", types_msg);
     else
-      event->Set("connectionTypes", base::Value::CreateNullValue());
+      event->Set("connectionTypes", base::MakeUnique<base::Value>());
   } else {
-    event->Set("connectionTypes", base::Value::CreateNullValue());
+    event->Set("connectionTypes", base::MakeUnique<base::Value>());
   }
 #endif  // defined(OS_CHROMEOS)
 
@@ -618,8 +619,7 @@ void AboutHandler::OnRegulatoryLabelDirFound(
     std::string callback_id,
     const base::FilePath& label_dir_path) {
   if (label_dir_path.empty()) {
-    ResolveJavascriptCallback(base::Value(callback_id),
-                              *base::Value::CreateNullValue());
+    ResolveJavascriptCallback(base::Value(callback_id), base::Value());
     return;
   }