DPWA: RegisterShortcutsMenuWithOs() only when WebApplicationInfo's

shortcut_infos() is populated.

This fixes an issue where we were calling RegisterShortcutsMenuWithOs()
even when shortcuts weren't provided in the PWA's web app manifest.

Bug: 1113324
Change-Id: Ib3965ee85643c12f29dbebf67db2f3862bba57e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2339704Reviewed-by: Alexey Baskakov <loyso@chromium.org>
Commit-Queue: Rahul Singh <rahsin@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#796131}

chrome/browser/web_applications/os_integration_manager.cc

@@ -215,14 +215,19 @@ void OsIntegrationManager::OnShortcutsCreated(
       ui_manager_->CanAddAppToQuickLaunchBar()) {
     ui_manager_->AddAppToQuickLaunchBar(app_id);
   }
-  if (shortcuts_created) {
+  if (shortcuts_created && base::FeatureList::IsEnabled(
+                               features::kDesktopPWAsAppIconShortcutsMenu)) {
     if (web_app_info) {
+      if (web_app_info->shortcut_infos.empty()) {
+        barrier_callback.Run(OsHookType::kShortcutsMenu, /*completed=*/false);
+      } else {
         shortcut_manager_->RegisterShortcutsMenuWithOs(
             app_id, web_app_info->shortcut_infos,
             web_app_info->shortcuts_menu_icons_bitmaps);
         // TODO(https://crbug.com/1098471): fix RegisterShortcutsMenuWithOs to
         // take callback.
         barrier_callback.Run(OsHookType::kShortcutsMenu, /*completed=*/true);
+      }
     } else {
       shortcut_manager_->ReadAllShortcutsMenuIconsAndRegisterShortcutsMenu(
           app_id, base::BindOnce(barrier_callback, OsHookType::kShortcutsMenu));