flags: assign reduced-referrer-granularity

Bug: None
Change-Id: Ibe69071fb7f40844686d67708f7bacdb2d016c16
Reviewed-on: https://chromium-review.googlesource.com/c/1474827
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Mike West <mkwst@chromium.org>
Auto-Submit: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632649}

chrome/browser/flag-metadata.json

@@ -2748,8 +2748,8 @@
   },
   {
     "name": "reduced-referrer-granularity",
-    // "owners": [ "your-team" ],
-    "expiry_milestone": 76
+    "owners": [ "jochen", "mkwst" ],
+    "expiry_milestone": 78
   },
   {
     "name": "remove-ntp-fakebox",