[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.cc b/chrome/browser/flag_descriptions.cc
index 98fd7c1..113859f 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -2681,6 +2681,11 @@
     "if enable update notification will hook up to notification scheduling "
     "system in native side";
 
+const char kUpdateNotificationServiceImmediateShowOptionName[] =
+    "Update notification service debug options";
+const char kUpdateNotificationServiceImmediateShowOptionDescription[] =
+    "Show update notification right immediately";
+
 const char kUsageStatsDescription[] =
     "When set, enables sharing of per-domain usage stats with the Digital "
     "Wellbeing app on Android, and allows Digital Wellbeing to suspend access "