Change C core surface API
diff --git a/BUILD b/BUILD
index 281375f..71a2e69 100644
--- a/BUILD
+++ b/BUILD
@@ -572,6 +572,7 @@
         "src/core/lib/channel/handshaker_factory.c",
         "src/core/lib/channel/handshaker_registry.c",
         "src/core/lib/compression/compression.c",
+        "src/core/lib/compression/compression_internal.c",
         "src/core/lib/compression/message_compress.c",
         "src/core/lib/compression/stream_compression.c",
         "src/core/lib/http/format_request.c",
@@ -703,6 +704,7 @@
         "src/core/lib/channel/handshaker_factory.h",
         "src/core/lib/channel/handshaker_registry.h",
         "src/core/lib/compression/algorithm_metadata.h",
+        "src/core/lib/compression/compression_internal.h",
         "src/core/lib/compression/message_compress.h",
         "src/core/lib/compression/stream_compression.h",
         "src/core/lib/http/format_request.h",