[sync] Extend expiration for various histograms about bookmarks

Implementation is going through changes and these histograms help
monitor regressions.

Change-Id: I4902903f1bf434b346e2e0f930619bdd145d3be8
Fixed: 1125783
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2440057
Auto-Submit: Mikel Astiz <mastiz@chromium.org>
Commit-Queue: Robert Kaplow <rkaplow@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811987}

tools/metrics/histograms/histograms_xml/sync/histograms.xml

@@ -84,7 +84,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Sync.BookmarksGUIDDuplicates" enum="BookmarksGUIDDuplicates"
-    expires_after="M87">
+    expires_after="M90">
   <owner>mastiz@chromium.org</owner>
   <owner>rushans@google.com</owner>
   <summary>
@@ -767,7 +767,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Sync.ProblematicServerSideBookmarks"
-    enum="RemoteBookmarkUpdateError" expires_after="M87">
+    enum="RemoteBookmarkUpdateError" expires_after="M90">
   <owner>mastiz@chromium.org</owner>
   <owner>rushans@google.com</owner>
   <summary>
@@ -777,7 +777,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Sync.ProblematicServerSideBookmarksDuringMerge"
-    enum="RemoteBookmarkUpdateError" expires_after="M87">
+    enum="RemoteBookmarkUpdateError" expires_after="M90">
   <owner>mastiz@chromium.org</owner>
   <owner>rushans@google.com</owner>
   <summary>