flags: run expiration process for M80

This change:
1) Marks flags that expired in M80 or earlier as expired, as we are now
   in M80;
2) Marks flags that expired in M76 or earlier as hard-expired by
   removing the temporary-unexpire-flags-m76 flag and associated
   feature.

TPMs will begin filing cleanup bugs for the remaining M76 and earlier
flags at this point.

Bug: 953690
Change-Id: Ibd6922fe1ffc5dbb090e91cdd558a4e60260e345
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1913866
Reviewed-by: Avi Drissman <[email protected]>
Commit-Queue: Elly Fong-Jones <[email protected]>
Cr-Commit-Position: refs/heads/master@{#715307}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index da6b3eb..067a657f 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -4493,12 +4493,12 @@
 
     // This set of flags is used to temporary reinstate expired flags; see
     // //docs/flag_expiry.md for details.
-    {"temporary-unexpire-flags-m76", flag_descriptions::kUnexpireFlagsM76Name,
-     flag_descriptions::kUnexpireFlagsM76Description, kOsAll,
-     FEATURE_VALUE_TYPE(flags::kUnexpireFlagsM76)},
     {"temporary-unexpire-flags-m78", flag_descriptions::kUnexpireFlagsM78Name,
      flag_descriptions::kUnexpireFlagsM78Description, kOsAll,
      FEATURE_VALUE_TYPE(flags::kUnexpireFlagsM78)},
+    {"temporary-unexpire-flags-m80", flag_descriptions::kUnexpireFlagsM80Name,
+     flag_descriptions::kUnexpireFlagsM80Description, kOsAll,
+     FEATURE_VALUE_TYPE(flags::kUnexpireFlagsM80)},
 
 #if defined(OS_CHROMEOS)
     {"lock-screen-media-controls",