Adding the creation_flags back to pending_extension_info. Add a unit test to cover the case when an…

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index fd3e8f36f63392ac57c4324e50847fa6abd6a73c..3c5b4bd5bcefceae2f400e9a6cc126b3f2b0b852 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -546,6 +546,7 @@ bool ExtensionService::UpdateExtension(const extensions::CRXFileInfo& file,
       installer->set_expected_version(expected_version,
                                       false /* fail_install_if_unexpected */);
     }
+    creation_flags = pending_extension_info->creation_flags();
     if (pending_extension_info->mark_acknowledged())
       external_install_manager_->AcknowledgeExternalExtension(id);
   } else if (extension) {