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* [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
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* [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
&AllowGuestViewElementDefinition);
  dict.SetMethod("getWebFrameId", &GetWebFrameId);
  dict.SetMethod("getWebPreference", &GetWebPreference);
  dict.SetMethod("setSpellCheckProvider", &SetSpellCheckProvider);
  dict.SetMethod("insertText", &InsertText);
  dict.SetMethod("insertCSS", &InsertCSS);
  dict.SetMethod("removeInsertedCSS", &RemoveInsertedCSS);
  dict.SetMethod("executeJavaScript", &ExecuteJavaScript);
  dict.SetMethod("executeJavaScriptInIsolatedWorld",
                 &ExecuteJavaScriptInIsolatedWorld);
  dict.SetMethod("setIsolatedWorldInfo", &SetIsolatedWorldInfo);
  dict.SetMethod("getResourceUsage", &GetResourceUsage);
#if BUILDFLAG(ENABLE_BUILTIN_SPELLCHECKER)
  dict.SetMethod("isWordMisspelled", &IsWordMisspelled);
  dict.SetMethod("getWordSuggestions", &GetWordSuggestions);
#endif
  dict.SetMethod("clearCache", &ClearCache);
  dict.SetMethod("_findFrameByRoutingId", &FindFrameByRoutingId);
  dict.SetMethod("_getFrameForSelector", &GetFrameForSelector);
  dict.SetMethod("_findFrameByName", &FindFrameByName);
  dict.SetMethod("_getOpener", &GetOpener);
  dict.SetMethod("_getParent", &GetFrameParent);
  dict.SetMethod("_getTop", &GetTop);
  dict.SetMethod("_getFirstChild", &GetFirstChild);
  dict.SetMethod("_getNextSibling", &GetNextSibling);
  dict.SetMethod("_getRoutingId", &GetRoutingId);
}
}  
NODE_LINKED_MODULE_CONTEXT_AWARE(electron_renderer_web_frame, Initialize)