Extend OptimizationGuide.PredictionModelDownloadManager.DownloadSucceeded

This histogram remains valuable for understanding download failure
frequency.

Fixed: 439592341
Change-Id: I9f8840f9b09c71e98289958ef7ffc6f42944d25b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6918202
Reviewed-by: Raj T <rajendrant@chromium.org>
Commit-Queue: Mike Wittman <wittman@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1511857}
diff --git a/tools/metrics/histograms/metadata/optimization/histograms.xml b/tools/metrics/histograms/metadata/optimization/histograms.xml
index d9435c3..42cdbc53 100644
--- a/tools/metrics/histograms/metadata/optimization/histograms.xml
+++ b/tools/metrics/histograms/metadata/optimization/histograms.xml
@@ -1912,7 +1912,7 @@
 
 <histogram
     name="OptimizationGuide.PredictionModelDownloadManager.DownloadSucceeded"
-    enum="BooleanSuccess" expires_after="2025-09-28">
+    enum="BooleanSuccess" expires_after="2026-09-28">
   <owner>rajendrant@chromium.org</owner>
   <owner>wittman@chromium.org</owner>
   <summary>