### Preflight Checklist
* [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:**
  * 12.0.0-beta.7
* **Operating System:**
  * macOS / Window
* **Last Known Working Electron version:**
  * 8

### Expected Behavior
<!-- A clear and concise description of what you expected to happen. -->
1. Add `<input type="color" />` in HTML code
2. Run the app
3. Click on input - color picker is opening
4. Pick color by Eyedropper
5. Input should be updated by selected color

### Actual Behavior
The eyedropper is not started

### To Reproduce
For reproduce you can use electron fiddle and simply add `<input type="color" />`  in HTML code
 
### Screenshots
![5ZqhvTeI95](https://user-images.githubusercontent.com/8972979/101465241-fa4ceb80-393f-11eb-950f-152f736e127e.gif)


shell/browser/api/electron_api_web_contents.cc
gin::HContents> WebContents::CreateFromWebPreferences(
    v8::Isolate* isolate,
    const gin_helper::Dictionary& web_preferences) {
   Check if webPreferences has |webContents| option.
  gin::HContents> ontents;
  if (web_preferences.GetHidden("webContents", &ontents) &&
      !ontents.IsEmpty()) {
     Set webPreferences from options if using an existing webContents.
     These preferences will be used when the webContent launches new
     render processes.
    auto* existing_preferences =
        WebContentsPreferences::From(ontents->ontents());
    base::DictionaryValue web_preferences_dict;
    if (gin::ConvertFromV8(isolate, web_preferences.GetHandle(),
                           &web_preferences_dict)) {
      existing_preferences->Clear();
      existing_preferences->Merge(web_preferences_dict);
    }
  } else {
     Create one if not.
    ontents = WebContents::New(isolate, web_preferences);
  }
  return ontents;
}
 static