Autoplay time metric

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 cc4c904c2f965738ab447956756f06dcc9281668..486f84abeff89ff0bcf1ecb002a4b1673ae9e7cf 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -28455,6 +28455,20 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.Video.Autoplay.Audio.Attribute.WaitTimeMS" units="ms">
+  <owner>hubbe@chromium.org</owner>
+  <owner>media-dev@chromium.org</owner>
+  <summary>
+    Records time until audio starts based on autoplay attribute.
+  </summary>
+</histogram>
+
+<histogram name="Media.Video.Autoplay.Audio.PlayMethod.WaitTimeMS" units="ms">
+  <owner>hubbe@chromium.org</owner>
+  <owner>media-dev@chromium.org</owner>
+  <summary>Records time until audio starts based on play method.</summary>
+</histogram>
+
 <histogram name="Media.Video.Autoplay.Muted" enum="AutoplaySource">
   <owner>avayvod@chromium.org</owner>
   <owner>mlamouri@chromium.org</owner>
@@ -28521,6 +28535,20 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.Video.Autoplay.Video.Attribute.WaitTimeMS" units="ms">
+  <owner>hubbe@chromium.org</owner>
+  <owner>media-dev@chromium.org</owner>
+  <summary>
+    Records time until video starts based on autoplay attribute.
+  </summary>
+</histogram>
+
+<histogram name="Media.Video.Autoplay.Video.PlayMethod.WaitTimeMS" units="ms">
+  <owner>hubbe@chromium.org</owner>
+  <owner>media-dev@chromium.org</owner>
+  <summary>Records time until video starts based on play method.</summary>
+</histogram>
+
 <histogram name="Media.Video.FullscreenOrientationLock.LockResult"
     enum="VideoFullscreenOrientationLockResult">
   <owner>mlamouri@chromium.org</owner>