[Update notification service]: Clean up some TODO flags.

- Add a debug option flag to show update notification right away.
- Also enable helpful/unhelpful buttons.

Change-Id: I878e337e9a2bf8aed1859553ab9a2fc29ec4de2c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2049044
Reviewed-by: Xing Liu <[email protected]>
Commit-Queue: Hesen Zhang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#742381}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index d7f3775..323bb54 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1540,6 +1540,8 @@
 
 extern const char kUpdateNotificationSchedulingIntegrationName[];
 extern const char kUpdateNotificationSchedulingIntegrationDescription[];
+extern const char kUpdateNotificationServiceImmediateShowOptionName[];
+extern const char kUpdateNotificationServiceImmediateShowOptionDescription[];
 
 extern const char kUsageStatsDescription[];
 extern const char kUsageStatsName[];