* [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:**
  * 7.0.0-beta.7
* **Operating System:**
  * Windows 10
* **Last Known Working Electron version:**
  * 6

### Expected Behavior
Cookies are received

### Actual Behavior
response.headers["set-cookie"] never contains cookies

### To Reproduce
Do a request using the net module as described here: https://electronjs.org/docs/api/net
to any site that will return cookies.

shell/browser/api/atom_api_url_loader.cc
const net::RedirectInfo& redirect_info,
    const network::mojom::URLResponseHead& response_head,
    std::vector<std::string>* removed_headers) {
  Emit("redirect", redirect_info, response_head.headers.get());
}
void SimpleURLLoaderWrapper::OnUploadProgress(uint64_t position,
                                              uint64_t total) {
  Emit("upload-progress", position, total);
}
void SimpleURLLoaderWrapper::OnDownloadProgress(uint64_t current) {
  Emit("download-progress", current);
}
void SimpleURLLoaderWrapper::BuildPrototype(
    v8::Isolate* isolate,
    v8::Local<v8::FunctionTemplate> prototype) {
  prototype->SetClassName(gin::StringToV8(isolate, "SimpleURLLoaderWrapper"));
  gin_helper::ObjectTemplateBuilder(isolate, prototype->PrototypeTemplate())
      .SetMethod("cancel", &SimpleURLLoaderWrapper::Cancel);
}
}  
}