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 d1800f8261a89d2e3f42ae6331697e1debe91683..dbf555bb3de4d8326e071b9a7d49956e218ed34d 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -26540,6 +26540,23 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Records the autoplay source of audios.</summary>
 </histogram>
 
+<histogram name="Media.Audio.Autoplay.Attribute.WaitTime" units="ms">
+  <owner>hubbe@chromium.org</owner>
+  <owner>media-dev@chromium.org</owner>
+  <summary>
+    Records time from load starts until audio starts based on autoplay
+    attribute.
+  </summary>
+</histogram>
+
+<histogram name="Media.Audio.Autoplay.PlayMethod.WaitTime" units="ms">
+  <owner>hubbe@chromium.org</owner>
+  <owner>media-dev@chromium.org</owner>
+  <summary>
+    Records time from load starts until audio starts based on play method.
+  </summary>
+</histogram>
+
 <histogram name="Media.Audio.Capture.CallbackError" enum="BooleanError">
   <obsolete>
     Deprecated as of 02/2017.
@@ -28755,6 +28772,15 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.Video.Autoplay.Attribute.WaitTime" units="ms">
+  <owner>hubbe@chromium.org</owner>
+  <owner>media-dev@chromium.org</owner>
+  <summary>
+    Records time from load starts until video starts based on autoplay
+    attribute.
+  </summary>
+</histogram>
+
 <histogram name="Media.Video.Autoplay.Muted" enum="AutoplaySource">
   <owner>avayvod@chromium.org</owner>
   <owner>mlamouri@chromium.org</owner>
@@ -28821,6 +28847,14 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   </summary>
 </histogram>
 
+<histogram name="Media.Video.Autoplay.PlayMethod.WaitTime" units="ms">
+  <owner>hubbe@chromium.org</owner>
+  <owner>media-dev@chromium.org</owner>
+  <summary>
+    Records time from load starts until video starts based on play method.
+  </summary>
+</histogram>
+
 <histogram name="Media.Video.FullscreenOrientationLock.LockResult"
     enum="VideoFullscreenOrientationLockResult">
   <owner>mlamouri@chromium.org</owner>