[Schedule update notification] add feature flag.

Bug: 1013685
Change-Id: Ie6d891ea3b97eaee29f694390d8b093d307b4c86
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1865132
Commit-Queue: Hesen Zhang <[email protected]>
Reviewed-by: Xing Liu <[email protected]>
Reviewed-by: David Trainor <[email protected]>
Cr-Commit-Position: refs/heads/master@{#707172}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index e0c9430..07d04e7 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1639,6 +1639,9 @@
 extern const char kUpdateMenuTypeInlineUpdateDownloadCanceled[];
 extern const char kUpdateMenuTypeInlineUpdateInstallFailed[];
 
+extern const char kUpdateNotificationSchedulingIntegrationName[];
+extern const char kUpdateNotificationSchedulingIntegrationDescription[];
+
 extern const char kUsageStatsDescription[];
 extern const char kUsageStatsName[];