Add smart suggestion for large downloads flag

This CL adds the flag for handling smart suggestion for large downloads

Bug: 1118207
Change-Id: I695757bef4119d97fc594d08945406a14a36723c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2368154
Commit-Queue: Hung Vu <[email protected]>
Reviewed-by: Xing Liu <[email protected]>
Reviewed-by: Min Qin <[email protected]>
Reviewed-by: Hesen Zhang <[email protected]>
Cr-Commit-Position: refs/heads/master@{#800737}
diff --git a/chrome/browser/flag_descriptions.h b/chrome/browser/flag_descriptions.h
index 2c032b10..aa34145 100644
--- a/chrome/browser/flag_descriptions.h
+++ b/chrome/browser/flag_descriptions.h
@@ -1785,6 +1785,9 @@
 extern const char kSiteIsolationForPasswordSitesName[];
 extern const char kSiteIsolationForPasswordSitesDescription[];
 
+extern const char kSmartSuggestionForLargeDownloadsName[];
+extern const char kSmartSuggestionForLargeDownloadsDescription[];
+
 extern const char kStartSurfaceAndroidName[];
 extern const char kStartSurfaceAndroidDescription[];