Update WebRTC.Call histograms expiry dates.

Bug: 1123584
Change-Id: Id90a5a6b76eb8fcfe62684015366abe9a64f9dd8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485110
Commit-Queue: Stefan Holmer <holmer@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#821653}

tools/metrics/histograms/histograms_xml/web_rtc/histograms.xml

@@ -777,7 +777,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.BWE.InitialVsConvergedDiff" units="kbps"
-    expires_after="2020-12-27">
+    expires_after="2022-12-27">
   <owner>holmer@chromium.org</owner>
   <summary>
     The difference between the bandwidth estimate at 2 seconds and 20 seconds
@@ -865,7 +865,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.BWE.RampUpTimeTo1000kbpsInMs" units="ms"
-    expires_after="2020-10-25">
+    expires_after="2022-10-25">
   <owner>holmer@chromium.org</owner>
   <summary>
     The time it takes the estimated bandwidth to reach 1000 kbps from the first
@@ -874,7 +874,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.BWE.RampUpTimeTo2000kbpsInMs" units="ms"
-    expires_after="2021-02-28">
+    expires_after="2022-02-28">
   <owner>holmer@chromium.org</owner>
   <summary>
     The time it takes the estimated bandwidth to reach 2000 kbps from the first
@@ -883,7 +883,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.BWE.RampUpTimeTo500kbpsInMs" units="ms"
-    expires_after="2021-04-18">
+    expires_after="2022-12-27">
   <owner>holmer@chromium.org</owner>
   <summary>
     The time it takes the estimated bandwidth to reach 500 kbps from the first
@@ -892,7 +892,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.BWE.Types" enum="WebRtcBweType"
-    expires_after="2020-10-11">
+    expires_after="2022-10-11">
   <owner>holmer@chromium.org</owner>
   <summary>
     The bandwidth estimation used in WebRTC calls. Records whether the BWE is
@@ -902,7 +902,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.Call.AudioBitrateReceivedInKbps" units="kbps"
-    expires_after="2021-04-25">
+    expires_after="2022-02-21">
   <owner>holmer@chromium.org</owner>
   <summary>
     Average audio bitrate received during a call, counted from first packet
@@ -912,7 +912,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.Call.BitrateReceivedInKbps" units="kbps"
-    expires_after="2021-04-25">
+    expires_after="2022-02-21">
   <owner>holmer@chromium.org</owner>
   <summary>
     Average total bitrate received during a call (audio + video + RTCP), counted
@@ -922,7 +922,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.Call.EstimatedSendBitrateInKbps" units="kbps"
-    expires_after="2021-04-11">
+    expires_after="2022-04-11">
   <owner>holmer@chromium.org</owner>
   <summary>
     Average estimated send bitrate during a call, counted from first packet sent
@@ -932,7 +932,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.Call.LifetimeInSeconds" units="seconds"
-    expires_after="2021-04-25">
+    expires_after="2022-02-21">
   <owner>asapersson@chromium.org</owner>
   <summary>
     The lifetime of a call. Recorded when a Call instance is destroyed.
@@ -940,7 +940,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.Call.PacerBitrateInKbps" units="kbps"
-    expires_after="2021-04-25">
+    expires_after="2022-02-21">
   <owner>holmer@chromium.org</owner>
   <summary>
     Average pacer bitrate during a call, counted from first packet sent until
@@ -950,7 +950,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.Call.RtcpBitrateReceivedInBps" units="bits/s"
-    expires_after="2021-04-25">
+    expires_after="2022-02-21">
   <owner>holmer@chromium.org</owner>
   <summary>
     Average RTCP bitrate received during a call, counted from first packet
@@ -984,7 +984,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="WebRTC.Call.VideoBitrateReceivedInKbps" units="kbps"
-    expires_after="2021-04-25">
+    expires_after="2022-02-21">
   <owner>holmer@chromium.org</owner>
   <summary>
     Average video bitrate received during a call, counted from first packet