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### Preflight Checklist
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* [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:**
  * 11.0.0-beta.13
  * 10.0.1
* **Operating System:**
  * Windows 10 (2004)

When calling [`navigator.clipboard.read()`](https://developer.mozilla.org/en-US/docs/Web/API/Clipboard/read) in the renderer process, the session's permission handler receives a request for the permission "unknown".

### Expected Behavior
The permission handler should receive a request for "clipboard-read" permission.

### Actual Behavior
The permission handler receives a request for "unknown" permission.

### To Reproduce
Electron Fiddler: https://gist.github.com/5046d997fb4648edd08ad8a2645e84a0

shell/common/gin_converters/content_converter.cc
v8::Isolate* isolate,
    content::WebContents* web_contents,
    const content::CustomContextMenuContext& context,
    const content::MenuItem& item) {
  gin_helper::Dictionary v8_item = gin::Dictionary::CreateEmpty(isolate);
  switch (item.type) {
    case content::MenuItem::CHECKABLE_OPTION:
    case content::MenuItem::GROUP:
      v8_item.Set("checked", item.checked);
      FALLTHROUGH;
    case content::MenuItem::OPTION:
    case content::MenuItem::SUBMENU:
      v8_item.Set("label", item.label);
      v8_item.Set("enabled", item.enabled);
      FALLTHROUGH;
    default:
      v8_item.Set("type", item.type);
  }
  if (item.type == content::MenuItem::SUBMENU)
    v8_item.Set("submenu",
                MenuToV8(isolate, web_contents, context, item.submenu));
  else if (item.action > 0)
    v8_item.Set("click", base::BindRepeating(ExecuteCommand, web_contents,
                                             item.action, context));
  return v8_item.GetHandle();
}
v8::Local<v8::Value> MenuToV8(v8::Isolate* isolate,