Remove base::Value::CreateNullValue

components/policy/core/common/registry_dict.cc

Index: components/policy/core/common/registry_dict.cc
diff --git a/components/policy/core/common/registry_dict.cc b/components/policy/core/common/registry_dict.cc
index 29c9df73133d7ec59a75f9a95b936961b18a4f2e..f4219042ab507f656d7bffe365b8735eb40bb803 100644
--- a/components/policy/core/common/registry_dict.cc
+++ b/components/policy/core/common/registry_dict.cc
@@ -76,7 +76,7 @@ std::unique_ptr<base::Value> ConvertValue(const base::Value& value,
   int int_value = 0;
   switch (schema.type()) {
     case base::Value::Type::NONE: {
-      return base::Value::CreateNullValue();
+      return base::MakeUnique<base::Value>();
     }
     case base::Value::Type::BOOLEAN: {
       // Accept booleans encoded as either string or integer.