initial commit of tracing context files
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index be7f30c..2245b0b 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -264,6 +264,7 @@
'src/core/ext/census/operation.c',
'src/core/ext/census/placeholders.c',
'src/core/ext/census/resource.c',
+ 'src/core/ext/census/trace_context.c',
'src/core/ext/census/tracing.c',
'src/core/plugin_registry/grpc_plugin_registry.c',
'src/boringssl/err_data.c',