1 files changed, 23 insertions, 5 deletions
diff --git a/src/core/lib/security/credentials/fake/fake_credentials.h b/src/core/lib/security/credentials/fake/fake_credentials.h
index e89e6e24cc..b7f6a1909f 100644
--- a/src/core/lib/security/credentials/fake/fake_credentials.h
+++ b/src/core/lib/security/credentials/fake/fake_credentials.h
@@ -55,10 +55,28 @@ const char* grpc_fake_transport_get_expected_targets(
 
 /* --  Metadata-only Test credentials. -- */
 
-typedef struct {
-  grpc_call_credentials base;
-  grpc_mdelem md;
-  bool is_async;
-} grpc_md_only_test_credentials;
+class grpc_md_only_test_credentials : public grpc_call_credentials {
+ public:
+  grpc_md_only_test_credentials(const char* md_key, const char* md_value,
+                                bool is_async)
+      : grpc_call_credentials(GRPC_CALL_CREDENTIALS_TYPE_OAUTH2),
+        md_(grpc_mdelem_from_slices(grpc_slice_from_copied_string(md_key),
+                                    grpc_slice_from_copied_string(md_value))),
+        is_async_(is_async) {}
+  ~grpc_md_only_test_credentials() override { GRPC_MDELEM_UNREF(md_); }
+
+  bool get_request_metadata(grpc_polling_entity* pollent,
+                            grpc_auth_metadata_context context,
+                            grpc_credentials_mdelem_array* md_array,
+                            grpc_closure* on_request_metadata,
+                            grpc_error** error) override;
+
+  void cancel_get_request_metadata(grpc_credentials_mdelem_array* md_array,
+                                   grpc_error* error) override;
+
+ private:
+  grpc_mdelem md_;
+  bool is_async_;
+};
 
 #endif /* GRPC_CORE_LIB_SECURITY_CREDENTIALS_FAKE_FAKE_CREDENTIALS_H */