Record the type of controls used for video persistence.

third_party/WebKit/Source/core/html/HTMLMediaElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights
  * reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 112 matching lines @@
 using WeakMediaElementSet = HeapHashSet<WeakMember<HTMLMediaElement>>;
 using DocumentElementSetMap =
     HeapHashMap<WeakMember<Document>, Member<WeakMediaElementSet>>;
 
 namespace {
 
 constexpr float kMostlyFillViewportThreshold = 0.85f;
 constexpr double kMostlyFillViewportBecomeStableSeconds = 5;
 constexpr double kCheckViewportIntersectionIntervalSeconds = 1;
 
+// This enum is used to record histograms. Do not reorder.
 enum MediaControlsShow {
   MediaControlsShowAttribute = 0,
   MediaControlsShowFullscreen,
   MediaControlsShowNoScript,
   MediaControlsShowNotShown,
   MediaControlsShowDisabledSettings,
   MediaControlsShowMax
 };
 
+// This enum is used to record histograms. Do not reorder.
+enum VideoPersistenceControlsType {
+  VideoPersistenceControlsTypeNative = 0,
+  VideoPersistenceControlsTypeCustom,
+  VideoPersistenceControlsTypeCount
+};
+
 String urlForLoggingMedia(const KURL& url) {
   static const unsigned maximumURLLengthForLogging = 128;
 
   if (url.getString().length() < maximumURLLengthForLogging)
     return url.getString();
   return url.getString().substring(0, maximumURLLengthForLogging) + "...";
 }
 
 const char* boolString(bool val) {
   return val ? "true" : "false";
@@ skipping 3083 matching lines @@
   if (remotePlaybackClient())
     remotePlaybackClient()->stateChanged(WebRemotePlaybackState::Connected);
 }
 
 // TODO(zqzhang): move logic for hiding controls here.
 void HTMLMediaElement::onBecamePersistentVideo(bool value) {
   if (!isHTMLVideoElement())
     return;
 
   if (value) {
+    // Record the type of video. If it is already fullscreen, it is a video with
+    // native controls, otherwise it is assumed to be with custom controls.
+    // This is only recorded when entering this mode.
+    DEFINE_STATIC_LOCAL(EnumerationHistogram, histogram,
+                        ("Media.VideoPersistence.ControlsType",
+                         VideoPersistenceControlsTypeCount));
+    if (isFullscreen())
+      histogram.count(VideoPersistenceControlsTypeNative);
+    else
+      histogram.count(VideoPersistenceControlsTypeCustom);
+
     if (isFullscreen())
       return;
 
     UserGestureIndicator gestureIndicator(
         DocumentUserGestureToken::create(&document()));
     Fullscreen::requestFullscreen(*this);
     m_isPersistentVideo = true;
   } else {
     if (!m_isPersistentVideo)
       return;
@@ skipping 967 matching lines @@
       kMostlyFillViewportBecomeStableSeconds, BLINK_FROM_HERE);
 }
 
 void HTMLMediaElement::viewportFillDebouncerTimerFired(TimerBase*) {
   m_mostlyFillingViewport = true;
   if (m_webMediaPlayer)
     m_webMediaPlayer->becameDominantVisibleContent(m_mostlyFillingViewport);
 }
 
 }  // namespace blink