ProxyConfigSourceToString  272 net/proxy/proxy_config.cc   dict->SetString("source", ProxyConfigSourceToString(source_));
ProxyConfigSourceToString 1588 net/proxy/proxy_config_service_linux.cc             << ProxyConfigSourceToString(cached_config_.source());
ProxyConfigSourceToString   33 net/proxy/proxy_config_source.h const char* ProxyConfigSourceToString(ProxyConfigSource source);