flags: assign new-net-error-page-ui

Bug: 852872
Change-Id: I9f484dcc5fc73fc7e664f84aab2c7dd74e321288
Reviewed-on: https://chromium-review.googlesource.com/c/1489133
Auto-Submit: Elly Fong-Jones <ellyjones@chromium.org>
Reviewed-by: Dan H <harringtond@google.com>
Commit-Queue: Elly Fong-Jones <ellyjones@chromium.org>
Cr-Commit-Position: refs/heads/master@{#635554}

chrome/browser/flag-metadata.json

@@ -2338,8 +2338,8 @@
   },
   {
     "name": "new-net-error-page-ui",
-    // "owners": [ "your-team" ],
-    "expiry_milestone": 76
+    "owners": [ "harringtond" ],
+    "expiry_milestone": 75
   },
   {
     "name": "new-password-form-parsing",