Extend subresource-redirect chrome-flag

Change-Id: I4d74b36ecce4a905aa3ef922cd71080651fa7a3c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2349987Reviewed-by: Michael Crouse <mcrouse@chromium.org>
Commit-Queue: rajendrant <rajendrant@chromium.org>
Cr-Commit-Position: refs/heads/master@{#797073}

chrome/browser/flag-metadata.json

@@ -2080,8 +2080,8 @@
   },
   {
     "name": "enable-subresource-redirect",
-    "owners": [ "robertogden", "tbansal" ],
-    "expiry_milestone": 85
+    "owners": [ "rajendrant", "mcrouse", "tbansal" ],
+    "expiry_milestone": 87
   },
   {
     "name": "enable-suggested-files",