Update cached kiosk app crx from usb stick.

chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc

Index: chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc
diff --git a/chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc b/chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc
index dee3532c6c1dccffa5639db659c0640f440256cc..ea96dd648c7617533ffbaa5b71cc9c453eac2aac 100644
--- a/chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc
@@ -41,6 +41,9 @@ KioskAppUpdateService::KioskAppUpdateService(
 
   if (automatic_reboot_manager_)
     automatic_reboot_manager_->AddObserver(this);
+
+  if (KioskAppManager::Get())
+    KioskAppManager::Get()->AddObserver(this);
 }
 
 KioskAppUpdateService::~KioskAppUpdateService() {
@@ -67,6 +70,8 @@ void KioskAppUpdateService::Shutdown() {
       extensions::ExtensionSystem::Get(profile_)->extension_service();
   if (service)
     service->RemoveUpdateObserver(this);
+  if (KioskAppManager::Get())
+    KioskAppManager::Get()->RemoveObserver(this);
 }
 
 void KioskAppUpdateService::OnAppUpdateAvailable(
@@ -114,6 +119,18 @@ void KioskAppUpdateService::WillDestroyAutomaticRebootManager() {
   automatic_reboot_manager_ = NULL;
 }
 
+void KioskAppUpdateService::OnKioskAppCacheUpdated(const std::string& app_id) {
+  if (app_id != app_id_)
+    return;
+
+  extensions::RuntimeEventRouter::DispatchOnRestartRequiredEvent(
+      profile_,
+      app_id_,
+      extensions::core_api::runtime::OnRestartRequired::REASON_APP_UPDATE);
+
+  StartAppUpdateRestartTimer();
+}
+
 KioskAppUpdateServiceFactory::KioskAppUpdateServiceFactory()
     : BrowserContextKeyedServiceFactory(
         "KioskAppUpdateService",