Add UMA to study the video types for mobile

content/renderer/media/android/webmediaplayer_android.cc

Index: content/renderer/media/android/webmediaplayer_android.cc
diff --git a/content/renderer/media/android/webmediaplayer_android.cc b/content/renderer/media/android/webmediaplayer_android.cc
index c3d6cec86548ef4c64e01732abea91c2dbe0b2e4..6fc7c263e7301647cb38747a80bcfa1b65399f58 100644
--- a/content/renderer/media/android/webmediaplayer_android.cc
+++ b/content/renderer/media/android/webmediaplayer_android.cc
@@ -991,6 +991,12 @@ void WebMediaPlayerAndroid::InitializePlayer(
     const GURL& first_party_for_cookies,
     bool allow_stored_credentials,
     int demuxer_client_id) {
+  UMA_HISTOGRAM_BOOLEAN(
+        "Media.MSE.Playback", player_type_ == MEDIA_PLAYER_TYPE_MEDIA_SOURCE);
+  if (player_type_ == MEDIA_PLAYER_TYPE_URL) {
+    UMA_HISTOGRAM_BOOLEAN("Media.Android.IsHttpLiveStreamingMedia",
+                          IsHLSStream());
+  }
   allow_stored_credentials_ = allow_stored_credentials;
   player_manager_->Initialize(
       player_type_, player_id_, url, first_party_for_cookies, demuxer_client_id,