* Output of `node_modules/.bin/electron --version`: v3.0.10
* Operating System (Platform and Version): Ubuntu 18.04.1 LTS

**Expected Behavior**

Executing `app.getPath('logs')` returns path to the log folder of the application.

**Actual behavior**

Throws an error:

```
A JavaScript error occurred in the main process
Uncaught Exception:
Error: Failed to get 'logs' path
    at Object.<anonymous> (/home/pawel/workspace/electron-quick-start/main.js:4:21)
    at Object.<anonymous> (/home/pawel/workspace/electron-quick-start/main.js:55:3)
    at Module._compile (internal/modules/cjs/loader.js:711:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:722:10)
    at Module.load (internal/modules/cjs/loader.js:620:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:559:12)
    at Function.Module._load (internal/modules/cjs/loader.js:551:3)
    at loadApplicationPackage (/home/pawel/workspace/electron-quick-start/node_modules/electron/dist/resources/default_app.asar/main.js:287:12)
    at Object.<anonymous> (/home/pawel/workspace/electron-quick-start/node_modules/electron/dist/resources/default_app.asar/main.js:328:5)
    at Object.<anonymous> (/home/pawel/workspace/electron-quick-start/node_modules/electron/dist/resources/default_app.asar/main.js:365:3)
```

**To Reproduce**

Repo: https://github.com/jarrodek/electron-quick-start/tree/get-path-log

If you provide a URL, please list the commands required to clone/setup/run your repo e.g.
```sh
$ git clone https://github.com/jarrodek/electron-quick-start.git -b get-path-log
$ npm install
$ npm start || electron .
```

**Additional Information**

It works on macOS. I haven't tested it on windows or other Linux systems.

atom/browser/api/atom_api_app.cc
ChildProcessLaunched(content::PROCESS_TYPE_RENDERER,
                       host->GetProcess().Handle());
}
void App::RenderProcessDisconnected(base::ProcessId host_pid) {
  ChildProcessDisconnected(host_pid);
}
void App::ChildProcessLaunched(int process_type, base::ProcessHandle handle) {
  auto pid = base::GetProcId(handle);
#if defined(OS_MACOSX)
  std::unique_ptr<base::ProcessMetrics> metrics(
      base::ProcessMetrics::CreateProcessMetrics(
          handle, content::BrowserChildProcessHost::GetPortProvider()));
#else
  std::unique_ptr<base::ProcessMetrics> metrics(
      base::ProcessMetrics::CreateProcessMetrics(handle));
#endif
  app_metrics_[pid] = std::make_unique<atom::ProcessMetric>(process_type, pid,
                                                            std::move(metrics));
}
void App::ChildProcessDisconnected(base::ProcessId pid) {
  app_metrics_.erase(pid);
}
base::FilePath App::GetAppPath() const {
  return app_path_;
}
void App::SetAppPath(const base::FilePath& app_path) {