Update expiration of Variations.PolicyRestriction

It is still useful to know how much this policy is used in the wild

Change-Id: I60ffb709ef9df8d7e986778cf96a01d7c863011b
bug: 1384127
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4031208
Commit-Queue: Robert Kaplow <rkaplow@chromium.org>
Auto-Submit: Julian Pastarmov <pastarmovj@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1072895}
diff --git a/tools/metrics/histograms/metadata/variations/histograms.xml b/tools/metrics/histograms/metadata/variations/histograms.xml
index 77009f5..7a6c33e 100644
--- a/tools/metrics/histograms/metadata/variations/histograms.xml
+++ b/tools/metrics/histograms/metadata/variations/histograms.xml
@@ -281,9 +281,9 @@
 </histogram>
 
 <histogram name="Variations.PolicyRestriction"
-    enum="VariationsRestrictionPolicyValues" expires_after="2022-04-30">
-  <owner>pastarmovj@chromium.org</owner>
+    enum="VariationsRestrictionPolicyValues" expires_after="2023-06-30">
   <owner>ydago@chromium.org</owner>
+  <owner>pastarmovj@chromium.org</owner>
   <owner>src/base/metrics/OWNERS</owner>
   <summary>
     Records the restrictions on how experiment variations are applied on the