[UMA] Change histogram expiry milestone

Bug: 1138282
Change-Id: Ice4b0f604d6bc5e4aa216c30066cd49777cf15e4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2490962Reviewed-by: Noel Gordon <noel@chromium.org>
Reviewed-by: Jesse Doherty <jwd@chromium.org>
Commit-Queue: Alex Danilo <adanilo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#820120}

tools/metrics/histograms/histograms_xml/file/histograms.xml

@@ -634,7 +634,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingFileType" enum="ViewFileType"
-    expires_after="M88">
+    expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -644,7 +644,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingFileType.Offline" enum="ViewFileType"
-    expires_after="M88">
+    expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -655,7 +655,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingFileType.Online" enum="ViewFileType"
-    expires_after="M88">
+    expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -666,7 +666,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingRootType" enum="FileManagerRootType"
-    expires_after="M88">
+    expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -676,7 +676,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingRootType.Offline"
-    enum="FileManagerRootType" expires_after="M88">
+    enum="FileManagerRootType" expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -687,7 +687,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingRootType.Online" enum="FileManagerRootType"
-    expires_after="M88">
+    expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -698,7 +698,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingTaskType" enum="FileManagerTaskType"
-    expires_after="M88">
+    expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -708,7 +708,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingTaskType.Offline"
-    enum="FileManagerTaskType" expires_after="M88">
+    enum="FileManagerTaskType" expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -719,7 +719,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.ViewingTaskType.Online" enum="FileManagerTaskType"
-    expires_after="M88">
+    expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>
@@ -730,7 +730,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="FileBrowser.VolumeType" enum="FileManagerVolumeType"
-    expires_after="M88">
+    expires_after="M92">
   <owner>slangley@chromium.org</owner>
   <owner>weifangsun@chromium.org</owner>
   <summary>