<!--  As an open source project with a dedicated but small maintainer team, it can sometimes take a long time for issues to be addressed so please be patient and we will get back to you as soon as we can.
-->

### 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
This is a bug report specifically for the 7.0 beta. 

* **Electron Version:**
  * 7.0.0-beta.6
* **Operating System:**
  * Ubuntu 18.04 x64, Windows 10
* **Last Known Working Electron version:**
  * 6.0.12

### Expected Behavior
SharedWorker should be functional and *shared* when using
  a custom protocol to provide a proper origin.

### Actual Behavior
SharedWorker does not execute when loaded from custom protocol.
It does execute when page is loaded with the `file://` protocol, but this 
  defeats the purpose, since it is not shared between contexts.

Also noticed while diagnosing the issue:
Creating a SharedWorker with node integration enabled using a Data URL crashes 
the renderer.  I verified that this works in Electron 6, figured the cause might be related.

### To Reproduce
Install and run the following repo:

https://github.com/krisdages/electron-7-shared-worker-broken

$ git clone https://github.com/krisdages/electron-7-shared-worker-broken
$ npm install
$ npm start

Sorry, had it implemented before seeing the "electron fiddle" option. May try that next time.

Thanks for looking into this :)
shell/browser/electron_browser_client.h
const base::Optional<url::Origin>& top_frame_origin) override;
  
  void RenderProcessHostDestroyed(content::RenderProcessHost* host) override;
  void RenderProcessReady(content::RenderProcessHost* host) override;
  void RenderProcessExited(
      content::RenderProcessHost* host,
      const content::ChildProcessTerminationInfo& info) override;
 private:
  struct ProcessPreferences {
    bool sandbox = false;
    bool native_window_open = false;
    bool disable_popups = false;
    bool web_security = true;
    content::BrowserContext* browser_context = nullptr;
  };
  bool ShouldForceNewSiteInstance(content::RenderFrameHost* current_rfh,
                                  content::RenderFrameHost* speculative_rfh,
                                  content::BrowserContext* browser_context,
                                  const GURL& dest_url,
                                  bool has_request_started) const;
  bool NavigationWasRedirectedCrossSite(
      content::BrowserContext* browser_context,
      content::SiteInstance* current_instance,
      content::SiteInstance* speculative_instance,
      const GURL& dest_url,
      bool has_request_started) const;
  void AddProcessPreferences(int process_id, ProcessPreferences prefs);
  void RemoveProcessPreferences(int process_id);
  bool IsProcessObserved(int process_id) const;
  bool IsRendererSandboxed(int process_id) const;