⏱️ Extend CustomTabs.CloseButton.ChildTab.ScopeAlgorithm.ClosesOneTab

Change-Id: I99cdeba5761834b3efa71912356fa24d4c98201a
Bug: 1160727
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2606264Reviewed-by: Steven Holte <holte@chromium.org>
Commit-Queue: Peter Conn <peconn@chromium.org>
Cr-Commit-Position: refs/heads/master@{#839727}

tools/metrics/histograms/histograms_xml/custom_tabs/histograms.xml

@@ -47,7 +47,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="CustomTabs.CloseButton.ChildTab.ScopeAlgorithm.ClosesOneTab"
-    enum="BooleanCloseJustCurrentTab" expires_after="2021-02-01">
+    enum="BooleanCloseJustCurrentTab" expires_after="M92">
   <owner>peconn@chromium.org</owner>
   <owner>
     src/chrome/android/java/src/org/chromium/chrome/browser/browserservices/OWNERS