Removed GPR_POSIX_FILE, and changed the files that used it
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index 78fa428..ab7b461 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -195,8 +195,7 @@
'src/core/lib/security/credentials/credentials.c',
'src/core/lib/security/credentials/credentials_metadata.c',
'src/core/lib/security/credentials/fake/fake_credentials.c',
- 'src/core/lib/security/credentials/google_default/credentials_posix.c',
- 'src/core/lib/security/credentials/google_default/credentials_windows.c',
+ 'src/core/lib/security/credentials/google_default/credentials_generic.c',
'src/core/lib/security/credentials/google_default/google_default_credentials.c',
'src/core/lib/security/credentials/iam/iam_credentials.c',
'src/core/lib/security/credentials/jwt/json_token.c',