Add base64 decoder
diff --git a/grpc.gemspec b/grpc.gemspec
index 240ea1c..4a698f9 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -245,6 +245,7 @@
   s.files += %w( src/core/lib/transport/static_metadata.h )
   s.files += %w( src/core/lib/transport/transport.h )
   s.files += %w( src/core/lib/transport/transport_impl.h )
+  s.files += %w( src/core/ext/transport/chttp2/transport/bin_decoder.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/bin_encoder.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/chttp2_transport.h )
   s.files += %w( src/core/ext/transport/chttp2/transport/frame.h )
@@ -391,6 +392,7 @@
   s.files += %w( src/core/lib/transport/transport.c )
   s.files += %w( src/core/lib/transport/transport_op_string.c )
   s.files += %w( src/core/ext/transport/chttp2/server/secure/server_secure_chttp2.c )
+  s.files += %w( src/core/ext/transport/chttp2/transport/bin_decoder.c )
   s.files += %w( src/core/ext/transport/chttp2/transport/bin_encoder.c )
   s.files += %w( src/core/ext/transport/chttp2/transport/chttp2_plugin.c )
   s.files += %w( src/core/ext/transport/chttp2/transport/chttp2_transport.c )