[ios] Add flag ownership for expired iOS flags

iOS flag owners were asked to claim ownership and state an expiry in
this announcement email:
https://groups.google.com/a/google.com/g/bling-team/c/7YC_3l6yEzo/m/1-iZg1fPAAAJ

For these flags, ownership was claimed, but owners said these are
already expired and should be removed. I have put M80 as the default
for these flags.

Though the flag ownership cleanup process will remind folks to remove
expired flags, it is better if folks proactively remove the flag.
Would the owners please remove the flag, or create a bug to remind
themselves to remove the flag?

Please lgtm for those flags where you have been named owner. Thanks!

Bug: 1058614
Change-Id: I3200ea515df13bf36a6e7a31a043c91c980b2033
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2093693Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Sergio Collazos <sczs@chromium.org>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Reviewed-by: Chris Lu <thegreenfrog@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Commit-Queue: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#748757}

chrome/browser/flag-metadata.json

@@ -470,6 +470,11 @@
     "owners": [ "tommycli" ],
     "expiry_milestone": 76
   },
+  {
+    "name": "collections-card-presentation-style",
+    "owners": [ "sczs" ],
+    "expiry_milestone": 80
+  },
   {
     "name": "composited-layer-borders",
     "owners": [ "ccameron" ],
@@ -2280,6 +2285,11 @@
     "owners": [ "jdoerrie" ],
     "expiry_milestone": 87
   },
+  {
+    "name": "find-in-page-iframe",
+    "owners": [ "thegreenfrog" ],
+    "expiry_milestone": 80
+  },
   {
     "name": "focus-mode",
     "owners": [ "dfried", "pbos", "yiningwang@google.com" ],
@@ -2490,6 +2500,11 @@
     // testing and should not be removed.
     "expiry_milestone": -1
   },
+  {
+    "name": "ignores-viewport-scale-limits",
+    "owners": [ "eugenebut" ],
+    "expiry_milestone": 80
+  },
   {
     "name": "improved-cookie-controls",
     "owners": [ "dullweber", "huanzhong" ],
@@ -3353,11 +3368,21 @@
     "owners": ["chrome-desktop-ui-seattle@google.com", "tbergquist"],
     "expiry_milestone": 82
   },
+  {
+    "name": "search-icon-toggle",
+    "owners": [ "gambard" ],
+    "expiry_milestone": 80
+  },
   {
     "name": "security-interstitials-dark-mode",
     "owners": ["estark"],
     "expiry_milestone": 79
   },
+  {
+    "name": "send-uma-cellular",
+    "owners": [ "thegreenfrog" ],
+    "expiry_milestone": 80
+  },
   {
     "name": "set-market-url-for-testing",
     "owners": [ "//chrome/android/java/src/org/chromium/chrome/browser/omaha/OWNERS" ],
@@ -3908,6 +3933,11 @@
     "owners": [ "toyoshim", "ksakamoto", "horo", "kinuko" ],
     "expiry_milestone": 83
   },
+  {
+    "name": "web-clear-browsing-data",
+    "owners": [ "gambard" ],
+    "expiry_milestone": 80
+  },
   {
     "name": "web-contents-occlusion",
     "owners": [ "davidbienvenu", "fdoray" ],