Wait for pending extensions before launching kiosk app.

chrome/browser/chromeos/app_mode/startup_app_launcher.cc

Index: chrome/browser/chromeos/app_mode/startup_app_launcher.cc
diff --git a/chrome/browser/chromeos/app_mode/startup_app_launcher.cc b/chrome/browser/chromeos/app_mode/startup_app_launcher.cc
index 4bdd7dd6ce48ac1ce6f32ad2953fbb741a03bb57..a7652a3fa33a39e87ca134d7316bbf2e8c46d23c 100644
--- a/chrome/browser/chromeos/app_mode/startup_app_launcher.cc
+++ b/chrome/browser/chromeos/app_mode/startup_app_launcher.cc
@@ -272,8 +272,13 @@ void StartupAppLauncher::MaybeLaunchApp() {
 
 void StartupAppLauncher::OnFinishCrxInstall(const std::string& extension_id,
                                             bool success) {
-  if (extension_id != app_id_)
+  // Wait for pending updates or dependent extensions to download.
+  if (extensions::ExtensionSystem::Get(profile_)
+          ->extension_service()
+          ->pending_extension_manager()
+          ->HasPendingExtensions()) {
     return;
+  }
 
   extensions::InstallTracker* tracker =
       extensions::InstallTrackerFactory::GetForBrowserContext(profile_);