* **Electron Version:**
  * 5.0.0-beta5
* **Operating System:**
  * Windows 10 (1803) x64, Raspberry Pi Debian Stretch
* **Last Known Working Electron version:**:
  * 3.0.3

### Expected Behavior
Starting electron with --inspect=XXXX or --inspect-brk=XXXX should open the port XXXX for connecting with a debugger that supports the inspect protocol (e.g. VS Code).

### Actual Behavior
If --inspect=XXXX or --inspect-brk=XXXX is supplied the opened port is always 9229 regardless of the supplied port XXXX. Depending on --inspect or inspect-brk the application starts or waits. Without supplying either no port is opened

### To Reproduce
Start electron with the arguments stated above.
atom/browser/node_debugger.cc
args.push_back(base::UTF16ToUTF8(arg));
#else
    args.push_back(arg);
#endif
  }
  node::DebugOptions options;
  std::vector<std::string> exec_args;
  std::vector<std::string> v8_args;
  std::vector<std::string> errors;
  node::options_parser::DebugOptionsParser::instance.Parse(
      &args, &exec_args, &v8_args, &options,
      node::options_parser::kDisallowedInEnvironment, &errors);
  if (!errors.empty()) {
    
    LOG(ERROR) << "Error parsing node options: "
               << base::JoinString(errors, " ");
  }
  
  
  if (options.wait_for_connect()) {
    mate::Dictionary process(env_->isolate(), env_->process_object());
    process.Set("_breakFirstLine", true);
  }
  const char* path = "";
  if (inspector->Start(path, options, env_->inspector_host_port(),
                       true ))
    DCHECK(env_->inspector_agent()->IsListening());
}
}