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### 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
const blink::WebVector<v8::Local<v8::Value>>& result) override {
    v8::Isolate* isolate = v8::Isolate::GetCurrent();
    if (!result.empty()) {
      if (!result[0].IsEmpty()) {
        v8::Local<v8::Value> value = result[0];
        
        
        
        bool should_clone_value =
            world_safe_result_ &&
            !(value->IsObject() &&
              promise_.GetContext() ==
                  value.As<v8::Object>()->CreationContext()) &&
            value->IsObject();
        if (should_clone_value) {
          CopyResultToCallingContextAndFinalize(isolate, value);
        } else {
          
          if (callback_)
            std::move(callback_).Run(value, v8::Undefined(isolate));
          promise_.Resolve(value);
        }
      } else {
        const char* error_message =
            "Script failed to execute, this normally means an error "
            "was thrown. Check the renderer console for the error.";
        if (!callback_.is_null()) {
          v8::Local<v8::Context> context = promise_.GetContext();
          v8::Context::Scope context_scope(context);
          std::move(callback_).Run(