flags: assign overscroll-history-navigation

Bug: None
Change-Id: I3bd9367fe4ee2eee7df32f3cc6f3a5539f9b08d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1559503
Auto-Submit: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Jinsuk Kim <jinsukkim@chromium.org>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#649279}

chrome/browser/flag-metadata.json

@@ -2639,8 +2639,8 @@
   },
   {
     "name": "overscroll-history-navigation",
-    // "owners": [ "your-team" ],
-    "expiry_milestone": 76
+     "owners": [ "mohsen", "jinsukkim" ],
+     "expiry_milestone": 77
   },
   {
     "name": "overscroll-start-threshold",