[Cookies] Update upgrade histogram lifetimes

Since we commit to supporting every upgrade path *until* the next
version is two years old (at which it becomes the new base version) we
should just have these histograms expire when their own related version
is old enough the upgrade path will be cut anyway. That way, this is a
nice reminder to remove the version from the code.

OBSOLETE_HISTOGRAMS=This upgrade path is no longer possible as of Feb 2024

Change-Id: I04dadb1796af3f8e809f6737beeb3634ef8db227
Fixed: 359221038
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5782994
Commit-Queue: Ari Chivukula <arichiv@chromium.org>
Reviewed-by: Chris Fredrickson <cfredric@chromium.org>
Auto-Submit: Ari Chivukula <arichiv@chromium.org>
Commit-Queue: Chris Fredrickson <cfredric@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1340494}

tools/metrics/histograms/metadata/cookie/histograms.xml

@@ -1115,18 +1115,8 @@ chromium-metrics-reviews@google.com.
   </summary>
 </histogram>
 
-<histogram name="Cookie.TimeDatabaseMigrationToV18" units="ms"
-    expires_after="2024-12-01">
-  <owner>arichiv@chromium.org</owner>
-  <owner>src/net/cookies/OWNERS</owner>
-  <summary>
-    The amount of time (ms) to migrate a v17 cookie database to v18. Migration
-    occurs upon first startup of a browser version with v17 database code.
-  </summary>
-</histogram>
-
 <histogram name="Cookie.TimeDatabaseMigrationToV19" units="ms"
-    expires_after="2024-09-22">
+    expires_after="2025-09-22">
   <owner>arichiv@chromium.org</owner>
   <owner>src/net/cookies/OWNERS</owner>
   <summary>
@@ -1136,7 +1126,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="Cookie.TimeDatabaseMigrationToV20" units="ms"
-    expires_after="2024-11-13">
+    expires_after="2025-11-14">
   <owner>bingler@chromium.org</owner>
   <owner>src/net/cookies/OWNERS</owner>
   <summary>
@@ -1146,7 +1136,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="Cookie.TimeDatabaseMigrationToV21" units="ms"
-    expires_after="2024-11-20">
+    expires_after="2025-11-22">
   <owner>cfredric@chromium.org</owner>
   <owner>src/net/cookies/OWNERS</owner>
   <summary>
@@ -1156,7 +1146,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="Cookie.TimeDatabaseMigrationToV22" units="ms"
-    expires_after="2025-03-19">
+    expires_after="2026-03-22">
   <owner>arichiv@chromium.org</owner>
   <owner>src/net/cookies/OWNERS</owner>
   <summary>
@@ -1166,7 +1156,7 @@ chromium-metrics-reviews@google.com.
 </histogram>
 
 <histogram name="Cookie.TimeDatabaseMigrationToV23" units="ms"
-    expires_after="2025-04-19">
+    expires_after="2026-04-10">
   <owner>selya@chromium.org</owner>
   <owner>src/net/cookies/OWNERS</owner>
   <summary>