Cleanup: Remove deprecated Profile::GetExtensionService().

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 e6956747850bd8efe3080c80940ae44346a61319..dee3532c6c1dccffa5639db659c0640f440256cc 100644
--- a/chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc
+++ b/chrome/browser/chromeos/app_mode/kiosk_app_update_service.cc
@@ -63,7 +63,8 @@ void KioskAppUpdateService::ForceAppUpdateRestart() {
 }
 
 void KioskAppUpdateService::Shutdown() {
-  ExtensionService* service = profile_->GetExtensionService();
+  ExtensionService* service =
+      extensions::ExtensionSystem::Get(profile_)->extension_service();
   if (service)
     service->RemoveUpdateObserver(this);
 }