Make symbols of BoringSSL private to gRPC
diff --git a/BUILD b/BUILD
index 81390dd..b76d47b 100644
--- a/BUILD
+++ b/BUILD
@@ -1543,6 +1543,7 @@
         "grpc_base",
         "grpc_transport_chttp2_alpn",
         "tsi",
+        "grpc_shadow_boringssl",
     ],
 )
 
@@ -1803,6 +1804,7 @@
         "gpr",
         "grpc_base",
         "tsi_interface",
+        "grpc_shadow_boringssl",
     ],
 )
 
@@ -1899,6 +1901,7 @@
         "grpc_base",
         "grpc_transport_chttp2_client_insecure",
         "tsi_interface",
+        "grpc_shadow_boringssl",
     ],
 )
 
@@ -2154,4 +2157,11 @@
     ],
 )
 
+grpc_cc_library(
+    name = "grpc_shadow_boringssl",
+    hdrs = [
+        "src/core/tsi/grpc_shadow_boringssl.h",
+    ],
+)
+
 grpc_generate_one_off_targets()