Rename port_hermetic to port_isolated_runtime_environment
diff --git a/grpc.gyp b/grpc.gyp
index 7e6a06c..b07696d 100644
--- a/grpc.gyp
+++ b/grpc.gyp
@@ -511,7 +511,7 @@
         'test/core/util/parse_hexstring.cc',
         'test/core/util/passthru_endpoint.cc',
         'test/core/util/port.cc',
-        'test/core/util/port_hermetic.cc',
+        'test/core/util/port_isolated_runtime_environment.cc',
         'test/core/util/port_server_client.cc',
         'test/core/util/slice_splitter.cc',
         'test/core/util/tracer_util.cc',
@@ -722,7 +722,7 @@
         'test/core/util/parse_hexstring.cc',
         'test/core/util/passthru_endpoint.cc',
         'test/core/util/port.cc',
-        'test/core/util/port_hermetic.cc',
+        'test/core/util/port_isolated_runtime_environment.cc',
         'test/core/util/port_server_client.cc',
         'test/core/util/slice_splitter.cc',
         'test/core/util/tracer_util.cc',