DeregisterExternalHandler  640 chrome/browser/custom_handlers/protocol_handler_registry.cc     delegate_->DeregisterExternalHandler(handler.protocol());
DeregisterExternalHandler  691 chrome/browser/custom_handlers/protocol_handler_registry.cc     delegate_->DeregisterExternalHandler(p->first);
DeregisterExternalHandler   79 chrome/browser/custom_handlers/protocol_handler_registry.h     virtual void DeregisterExternalHandler(const std::string& protocol);