Increase timeline for PasswordManager histograms.

Bug: 1138427
Change-Id: Ib1ca6fc6a60ffd3101d7d9a0e0dc995bf600a650
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2472522Reviewed-by: Chris Thompson <cthomp@chromium.org>
Commit-Queue: Bettina Dea <bdea@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817240}

tools/metrics/histograms/histograms_xml/password/histograms.xml

@@ -845,7 +845,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="PasswordManager.CompromisedCredentials" enum="CompromiseType"
-    expires_after="2020-11-26">
+    expires_after="2021-04-26">
   <owner>bdea@chromium.org</owner>
   <owner>chrome-safebrowsing-alerts@google.com</owner>
   <summary>
@@ -1824,7 +1824,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="PasswordManager.RemoveCompromisedCredentials.RemoveReason"
-    enum="RemoveCompromisedCredentialsReason" expires_after="2020-11-26">
+    enum="RemoveCompromisedCredentialsReason" expires_after="2021-04-04">
   <owner>bdea@chromium.org</owner>
   <owner>chrome-safebrowsing-alerts@google.com</owner>
   <summary>