chore: remove use of banned absl::optional (#44513)

Xref: https://chromium-review.googlesource.com/c/chromium/src/+/5805666

shell/browser/electron_browser_client.cc

@@ -1672,7 +1672,7 @@ ElectronBrowserClient::CreateURLLoaderThrottles(
     const base::RepeatingCallback<content::WebContents*()>& wc_getter,
     content::NavigationUIData* navigation_ui_data,
     content::FrameTreeNodeId frame_tree_node_id,
-    absl::optional<int64_t> navigation_id) {
+    std::optional<int64_t> navigation_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
   std::vector<std::unique_ptr<blink::URLLoaderThrottle>> result;