fix: fix vibrancy applying without transparency

shell/browser/api/electron_api_browser_window.cc

@@ -42,11 +42,23 @@ BrowserWindow::BrowserWindow(gin::Arguments* args,
   auto web_preferences = gin_helper::Dictionary::CreateEmpty(isolate);
   options.Get(options::kWebPreferences, &web_preferences);
 
+  bool transparent = false;
+  options.Get(options::kTransparent, &transparent);
+
+  std::string vibrancy_type;
+#if BUILDFLAG(IS_MAC)
+  options.Get(options::kVibrancyType, &vibrancy_type);
+#endif
+
   // Copy the backgroundColor to webContents.
   std::string color;
   if (options.Get(options::kBackgroundColor, &color)) {
     web_preferences.SetHidden(options::kBackgroundColor, color);
+#if BUILDFLAG(IS_WIN)
   } else if (window_->IsTranslucent()) {
+#else
+  } else if (!vibrancy_type.empty() || transparent) {
+#endif
     // If the BrowserWindow is transparent or a vibrancy type has been set,
     // also propagate transparency to the WebContents unless a separate
     // backgroundColor has been set.