Delay expiry of histograms causing alerts.

Updates the expires_after attribute for 44 histograms that have
been used to generate alerts in the past 180 days and do not already have
a date later than or within 60 days of 2021-05-31.

TBR=chromium-metrics-reviews@google.com

Change-Id: I8a5941775477a8deb70d04d2f276da070b981ae6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2727585
Commit-Queue: Chrome Metrics Logs <chrome-metrics-team+robot@google.com>
Commit-Queue: Caitlin Fischer <caitlinfischer@google.com>
Bot-Commit: Chrome Metrics Logs <chrome-metrics-team+robot@google.com>
Reviewed-by: Caitlin Fischer <caitlinfischer@google.com>
Cr-Commit-Position: refs/heads/master@{#859034}

tools/metrics/histograms/histograms_xml/cryptohome/histograms.xml

@@ -22,7 +22,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 <histograms>
 
 <histogram name="Cryptohome.AsyncDBusRequest" units="ms"
-    expires_after="2021-06-27">
+    expires_after="2021-08-29">
   <owner>zuan@chromium.org</owner>
   <owner>cros-hwsec+uma@chromium.org</owner>
   <summary>

tools/metrics/histograms/histograms_xml/gpu/histograms.xml

@@ -1253,7 +1253,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="GPU.Vulkan.PipelineCache.LoadCacheHit" enum="BooleanCacheHit"
-    expires_after="2021-06-25">
+    expires_after="2021-08-29">
   <owner>backer@chromium.org</owner>
   <owner>penghuang@chromium.org</owner>
   <owner>vasilyt@chromium.org</owner>

tools/metrics/histograms/histograms_xml/history/histograms.xml

@@ -680,7 +680,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="History.InMemoryURLIndexRestoreCacheTime" units="ms"
-    expires_after="2021-06-30">
+    expires_after="2021-08-29">
   <owner>tommycli@chromium.org</owner>
   <owner>mpearson@chromium.org</owner>
   <summary>

tools/metrics/histograms/histograms_xml/offline/histograms.xml

@@ -870,7 +870,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="OfflinePages.Prefetching.FinishedItemErrorCode"
-    enum="OfflinePrefetchItemErrorCode" expires_after="2021-06-25">
+    enum="OfflinePrefetchItemErrorCode" expires_after="2021-08-29">
   <owner>carlosk@chromium.org</owner>
   <owner>offline-dev@chromium.org</owner>
   <summary>
@@ -949,7 +949,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="OfflinePages.Prefetching.UniqueUrlsAddedCount" units="urls"
-    expires_after="2021-06-25">
+    expires_after="2021-08-29">
   <owner>dewittj@chromium.org</owner>
   <owner>offline-dev@chromium.org</owner>
   <summary>

tools/metrics/histograms/histograms_xml/omnibox/histograms.xml

@@ -64,7 +64,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Omnibox.CharTypedToRepaintLatency" units="ms"
-    expires_after="2021-06-30">
+    expires_after="2021-08-29">
   <owner>jdonnelly@chromium.org</owner>
   <owner>mpearson@chromium.org</owner>
   <owner>asvitkine@chromium.org</owner>

tools/metrics/histograms/histograms_xml/others/histograms.xml

@@ -17796,7 +17796,7 @@ regressions. -->
 </histogram>
 
 <histogram name="WebFont.LocalFontUsed" enum="BooleanUsage"
-    expires_after="2021-06-27">
+    expires_after="2021-08-29">
   <owner>hajimehoshi@chromium.org</owner>
   <owner>kenjibaheux@chromium.org</owner>
   <owner>kouhei@chromium.org</owner>

tools/metrics/histograms/histograms_xml/tab/histograms.xml

@@ -2058,7 +2058,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Tabs.TabSearch.NumWindowsOnOpen" units="windows"
-    expires_after="2021-06-20">
+    expires_after="2021-08-29">
   <owner>tluk@chromium.org</owner>
   <owner>robliao@chromium.org</owner>
   <summary>