[journey] Add flag for hiding visits.

Bug: b/260755715
Change-Id: I5380866eeb74d7913a873213a0637daff6182e33
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4301969
Commit-Queue: Tommy Li <[email protected]>
Commit-Queue: manuk hovanesian <[email protected]>
Auto-Submit: manuk hovanesian <[email protected]>
Reviewed-by: Tommy Li <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1112004}
diff --git a/chrome/browser/flag_descriptions.cc b/chrome/browser/flag_descriptions.cc
index d95ba52..3cb3f17 100644
--- a/chrome/browser/flag_descriptions.cc
+++ b/chrome/browser/flag_descriptions.cc
@@ -1843,6 +1843,10 @@
 const char kJourneysContentClusteringDescription[] =
     "Enables clustering page loads using content annotations.";
 
+const char kJourneysHideVisitsName[] = "History Journeys Hide Visits";
+const char kJourneysHideVisitsDescription[] =
+    "Adds a UI element to hide individual cluster visits in the webUI.";
+
 const char kJourneysImagesName[] = "History Journeys Images";
 const char kJourneysImagesDescription[] =
     "Enables Images for the History Journeys UI.";