SpaceInInputFIFO  121 native_client_sdk/src/libraries/nacl_io/socket/tcp_node.cc     size_t rx_space_avail = emitter_->SpaceInInputFIFO();
SpaceInInputFIFO   31 native_client_sdk/src/libraries/nacl_io/stream/stream_event_emitter.h   uint32_t SpaceInInputFIFO();