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### Preflight Checklist
<!-- Please ensure you've completed the following steps by replacing [ ] with [x]-->

* [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
* [x] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
* [x] I have searched the issue tracker for an issue that matches the one I want to file, without success.

### Issue Details

* **Electron Version:** 
  * <!-- (output of `node_modules/.bin/electron --version`) e.g. 4.0.3 --> 5.0.3
* **Operating System:** 
  * <!-- (Platform and Version) e.g. macOS 10.13.6 / Windows 10 (1803) / Ubuntu 18.04 x64 --> macOS 10.14
* **Last Known Working Electron version:** 
  * <!-- (if applicable) e.g. 3.1.0 --> n/a

### Expected Behavior
<!-- A clear and concise description of what you expected to happen. -->

`app.moveToApplicationsFolder` should throw when it fails, as the docs say.

### Actual Behavior
<!-- A clear and concise description of what actually happened. -->

It doesn't throw, in fact it even returns `true`.

### To Reproduce

- Have Foo v1 located in `/Applications/Foo.app`
- Open it
- Have Foo v2, still named `Foo.app`, located somewhere else
- Open it
- Use `app.moveToApplicationsFolder`.
- Instead of moving the app the currently open Foo v1 window will be focused, and `app.moveToApplicationsFolder` returns `true` instead of throwing.

shell/browser/api/atom_api_app.cc
if (Browser::Get()->is_ready()) {
    args->ThrowError(
        "app.disableDomainBlockingFor3DAPIs() can only be called "
        "before app is ready");
    return;
  }
  content::GpuDataManagerImpl::GetInstance()
      ->DisableDomainBlockingFor3DAPIsForTesting();
}
bool App::IsAccessibilitySupportEnabled() {
  auto* ax_state = content::BrowserAccessibilityState::GetInstance();
  return ax_state->IsAccessibleBrowser();
}
void App::SetAccessibilitySupportEnabled(bool enabled, mate::Arguments* args) {
  if (!Browser::Get()->is_ready()) {
    args->ThrowError(
        "app.setAccessibilitySupportEnabled() can only be called "
        "after app is ready");
    return;
  }
  auto* ax_state = content::BrowserAccessibilityState::GetInstance();
  if (enabled) {
    ax_state->OnScreenReaderDetected();
  } else {
    ax_state->DisableAccessibility();
  }
  Browser::Get()->OnAccessibilitySupportChanged();
}
Browser::LoginItemSettings App::GetLoginItemSettings(mate::Arguments* args) {