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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.
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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_context_bridge.cc
if (try_catch.HasCaught()) {
        did_error = true;
        auto message = try_catch.Message();
        if (message.IsEmpty() ||
            !gin::ConvertFromV8(args.isolate(), message->Get(),
                                &error_message)) {
          error_message =
              "An unknown exception occurred in the isolated context, an error "
              "occurred but a valid exception was not thrown.";
        }
      }
    }
    if (did_error) {
      v8::Context::Scope calling_context_scope(calling_context);
      args.isolate()->ThrowException(
          v8::Exception::Error(gin::StringToV8(args.isolate(), error_message)));
      return;
    }
    if (maybe_return_value.IsEmpty())
      return;
    auto ret = PassValueToOtherContext(
        func_owning_context, calling_context,
        maybe_return_value.ToLocalChecked(), &object_cache,
        support_dynamic_properties, 0, BridgeErrorTarget::kDestination);
    if (ret.IsEmpty())
      return;
    info.GetReturnValue().Set(ret.ToLocalChecked());
  }
}
v8::MaybeLocal<v8::Object> CreateProxyForAPI(