72     std::string* error_out) {  in CreateOffer()  argument
77       error_out);  in CreateOffer()
104     std::string* error_out) {  in CreateAnswer()  argument
109       error_out);  in CreateAnswer()
135     std::string* error_out) {  in CreateSdp()  argument
140   if (error_out && !observer->result()) {  in CreateSdp()
141     *error_out = observer->error();  in CreateSdp()
148     std::string* error_out) {  in SetLocalDescription()  argument
153       error_out);  in SetLocalDescription()
158     std::string* error_out) {  in SetRemoteDescription()  argument
163       error_out);  in SetRemoteDescription()
168     RTCError* error_out) {  in SetRemoteDescription()  argument
174   if (error_out)  in SetRemoteDescription()
175     *error_out = std::move(observer->error());  in SetRemoteDescription()
181     std::string* error_out) {  in SetSdp()  argument
186   if (error_out && !observer->result()) {  in SetSdp()
187     *error_out = observer->error();  in SetSdp()