update histograms list with new webrtc video e2e delay metrics

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 7897d0c7627e8c65badeeb72110398d585be5354..d140ebb6deb02ea19bc25cc4b01216016805cb66 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -81017,6 +81017,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="WebRTC.Video.EndToEndDelayMaxInMs" units="ms">
+  <owner>ilnik@chromium.org</owner>
+  <summary>
+    The maximum end-to-end delay per frame for a received video stream. Recorded
+    when a stream is removed.
+  </summary>
+</histogram>
+
 <histogram name="WebRTC.Video.FecBitrateReceivedInKbps" units="kbps">
   <owner>asapersson@chromium.org</owner>
   <summary>
@@ -81394,6 +81402,22 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="WebRTC.Video.Screenshare.EndToEndDelayInMs" units="ms">
+  <owner>ilnik@chromium.org</owner>
+  <summary>
+    The average end-to-end delay per frame for a received screenshare stream.
+    Recorded when a stream is removed.
+  </summary>
+</histogram>
+
+<histogram name="WebRTC.Video.Screenshare.EndToEndDelayMaxInMs" units="ms">
+  <owner>ilnik@chromium.org</owner>
+  <summary>
+    The maximum end-to-end delay per frame for a received screenshare stream.
+    Recorded when a stream is removed.
+  </summary>
+</histogram>
+
 <histogram name="WebRTC.Video.Screenshare.FecBitrateSentInKbps" units="kbps">
   <owner>sprang@chromium.org</owner>
   <summary>