<!--  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

* **Electron Version:**
  * 10.1.3
* **Operating System:**
  * win7 sp1 x64

- without worldSafeExecuteJavaScript, `(webFrame|webContents).executeJavaScript('new Promise(resolve => setTimeout(() => resolve(2), 3000));')` works as expected; the executeJavaScript promise waits for the eval promise.
- in the case of webFrame the evaled promise is returned raw
- in the case of webContents the promise is marshaled
- with worldSafeExecuteJavaScript, both error with: "An object could not be cloned"
- webContents should continue marshaling promises, otherwise its an unnecessary breaking change
- webFrame should marshal promises for consistency with webContents
- the clone restriction would be on the promise resolve value

### To Reproduce
`(webFrame|webContents).executeJavaScript('new Promise(resolve => setTimeout(() => resolve(2), 3000));')`


shell/renderer/api/electron_api_web_frame.cc
v8::Local<v8::Value> window,
                const std::string& text) {
  auto* render_frame = GetRenderFrame(window);
  if (!render_frame) {
    thrower.ThrowError(
        "Render frame was torn down before webFrame.insertText could be "
        "executed");
    return;
  }
  blink::WebFrame* web_frame = render_frame->GetWebFrame();
  if (web_frame->IsWebLocalFrame()) {
    web_frame->ToWebLocalFrame()
        ->FrameWidget()
        ->GetActiveWebInputMethodController()
        ->CommitText(blink::WebString::FromUTF8(text),
                     blink::WebVector<ui::ImeTextSpan>(), blink::WebRange(), 0);
  }
}
base::string16 InsertCSS(v8::Local<v8::Value> window,