UnSetVar           50 base/environment.cc   virtual bool UnSetVar(const char* variable_name) OVERRIDE {
UnSetVar           60 chrome/browser/shell_integration_linux_unittest.cc   virtual bool UnSetVar(const char* variable_name) OVERRIDE {
UnSetVar          127 net/proxy/proxy_config_service_linux_unittest.cc   virtual bool UnSetVar(const char* variable_name) OVERRIDE {