Histogram ownership cleanup

Bug: 610222
Change-Id: I9e94153e836f504c61ef216990d2dfd1ae77771c
Reviewed-on: https://chromium-review.googlesource.com/c/1313590
Commit-Queue: Peter Lee <pkl@chromium.org>
Reviewed-by: Kurt Horimoto <kkhorimoto@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#605026}

tools/metrics/histograms/histograms.xml

@@ -23262,15 +23262,18 @@ uploading your change for review.
   </summary>
 </histogram>
 
-<histogram name="Download.IOSDownloadedFileAction" enum="DownloadedFileAction">
-  <owner>bdibello@chromium.org</owner>
+<histogram name="Download.IOSDownloadedFileAction" enum="DownloadedFileAction"
+    expires_after="2020-01-15">
+  <owner>eugenebut@chromium.org</owner>
   <summary>
     The action that a user takes on a file after it has been successfully
     downloaded on iOS.
   </summary>
 </histogram>
 
-<histogram name="Download.IOSDownloadedFileNetError" enum="NetErrorCodes">
+<histogram name="Download.IOSDownloadedFileNetError" enum="NetErrorCodes"
+    expires_after="2020-01-15">
+  <owner>eugenebut@chromium.org</owner>
   <owner>mrefaat@chromium.org</owner>
   <summary>
     Positive net error codes that happens in the case of download content fetch
@@ -23278,17 +23281,17 @@ uploading your change for review.
   </summary>
 </histogram>
 
-<histogram name="Download.IOSDownloadedFileStatusCode">
-  <owner>stkhapugin@chromium.org</owner>
+<histogram name="Download.IOSDownloadedFileStatusCode"
+    expires_after="2020-01-15">
   <owner>eugenebut@chromium.org</owner>
-  <owner>stuartmorgan@chromium.org</owner>
+  <owner>stkhapugin@chromium.org</owner>
   <summary>
     HTTP status code returned when file download completes on iOS.
   </summary>
 </histogram>
 
 <histogram name="Download.IOSDownloadFileInBackground"
-    enum="DownloadFileInBackground">
+    enum="DownloadFileInBackground" expires_after="2020-01-15">
   <owner>eugenebut@chromium.org</owner>
   <summary>
     Logged when the download is completed (successfully or not) or in-progress
@@ -23298,13 +23301,16 @@ uploading your change for review.
   </summary>
 </histogram>
 
-<histogram name="Download.IOSDownloadFileResult" enum="DownloadFileResult">
-  <owner>bdibello@chromium.org</owner>
+<histogram name="Download.IOSDownloadFileResult" enum="DownloadFileResult"
+    expires_after="2020-01-15">
+  <owner>eugenebut@chromium.org</owner>
   <summary>Result when a user attempts to download a file on iOS.</summary>
 </histogram>
 
-<histogram name="Download.IOSDownloadInstallDrivePromoShown" enum="Boolean">
+<histogram name="Download.IOSDownloadInstallDrivePromoShown" enum="Boolean"
+    expires_after="2020-01-15">
   <owner>eugenebut@chromium.org</owner>
+  <owner>pkl@chromium.org</owner>
   <summary>
     Logged when the download was successfully completed. Bool value indicates
     whether or not Install Google Drive promo was shown to the user.
@@ -23320,8 +23326,8 @@ uploading your change for review.
 </histogram>
 
 <histogram name="Download.IOSDownloadPassKitResult"
-    enum="DownloadPassKitResult">
-  <owner>gchatz@chromium.org</owner>
+    enum="DownloadPassKitResult" expires_after="2020-01-15">
+  <owner>eugenebut@chromium.org</owner>
   <summary>
     Result when a user attempts to download a PassKit file on iOS.
   </summary>
@@ -109304,8 +109310,10 @@ uploading your change for review.
   </summary>
 </histogram>
 
-<histogram name="Tab.PullDownGesture" enum="PullDownGestureAction">
-  <owner>jbbegue@google.com</owner>
+<histogram name="Tab.PullDownGesture" enum="PullDownGestureAction"
+    expires_after="2020-01-15">
+  <owner>gambard@chromium.org</owner>
+  <owner>kkhorimoto@chromium.org</owner>
   <summary>
     Record the action executed when the user performs a pull down gesture. This
     feature is currently iOS only.
@@ -109455,8 +109463,10 @@ uploading your change for review.
   </summary>
 </histogram>
 
-<histogram name="Tab.StateAtRendererTermination" enum="TabForegroundState">
-  <owner>stuartmorgan@chromium.org</owner>
+<histogram name="Tab.StateAtRendererTermination" enum="TabForegroundState"
+    expires_after="2019-08-07">
+  <owner>olivierrobin@chromium.org</owner>
+  <owner>pkl@chromium.org</owner>
   <summary>
     The state (foreground/background) of a tab when its renderer is terminated.
   </summary>