Expose core metadata validation functions in public headers
diff --git a/grpc.gemspec b/grpc.gemspec
index ee5c22c..fabf683 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -378,6 +378,7 @@
s.files += %w( src/core/surface/server.c )
s.files += %w( src/core/surface/server_chttp2.c )
s.files += %w( src/core/surface/server_create.c )
+ s.files += %w( src/core/surface/validate_metadata.c )
s.files += %w( src/core/surface/version.c )
s.files += %w( src/core/transport/byte_stream.c )
s.files += %w( src/core/transport/chttp2/alpn.c )