Record the type of controls used for video persistence.

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 271165e3169fabff7a4b66573c535a18546f9461..128fad2bd3199e620d7ac805bfb70ac843c9299c 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -27363,6 +27363,16 @@ http://cs/file:chrome/histograms.xml - but prefer this file for new entries.
   <summary>Pixel format used in HTML5 video. Emitted on video load.</summary>
 </histogram>
 
+<histogram name="Media.VideoPersistence.ControlsType"
+    enum="VideoPersistenceControlsType">
+  <owner>mlamouri@chromium.org</owner>
+  <owner>zqzhang@chromium.org</owner>
+  <summary>
+    Record the type of controls a persisted video is using. This is recorded
+    every time a video enters persistence mode
+  </summary>
+</histogram>
+
 <histogram name="Media.VideoPixelFormat" enum="VideoPixelFormat">
   <obsolete>
     Replaced by Media.VideoFormat 05/2015.
@@ -112420,6 +112430,11 @@ from previous Chrome versions.
   <int value="2" label="Landscape"/>
 </enum>
 
+<enum name="VideoPersistenceControlsType" type="int">
+  <int value="0" label="Native controls"/>
+  <int value="1" label="Custom controls"/>
+</enum>
+
 <enum name="VideoPixelFormat" type="int">
   <obsolete>
     Deprecated as of 05/2015. Substituted by VideoFormat.