Start using the mediaControlsOverlayPlayButtonEnabled setting

Source/core/css/mediaControlsAndroid.css

 /*
  * Copyright (C) 2012 Google Inc.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 }
 
 audio::-webkit-media-controls-enclosure {
     height: 35px;
 }
 
 video::-webkit-media-controls-enclosure {
     height: 40px;
 }
 
-video::-webkit-media-controls-overlay-enclosure {
-    display: flex;
-    position: relative;
-    flex-direction: column;
-    justify-content: flex-end;
-    align-items: center;
-    flex: 1 1;
-    width: 100%;
-    max-width: 800px;
-    text-indent: 0;
-    box-sizing: border-box;
-    overflow: hidden;
-}
-
 audio::-webkit-media-controls-panel, video::-webkit-media-controls-panel {
     height: 35px;
 }
 
 audio::-webkit-media-controls-mute-button, video::-webkit-media-controls-mute-button {
     display: none;
 }
 
-video::-webkit-media-controls-overlay-play-button {
-    -webkit-appearance: media-overlay-play-button;
-    display: flex;
-    position: absolute;
-    top: 50%;
-    left: 50%;
-    margin-left: -40px;
-    margin-top: -40px;
-    border: none;
-    box-sizing: border-box;
-    background-color: transparent;
-    width: 80px;
-    height: 80px;
-    padding: 0;
-}
-
 audio::-webkit-media-controls-play-button, video::-webkit-media-controls-play-button {
     width: 35px;
     height: 35px;
     line-height: 35px;
 }
 
 audio::-webkit-media-controls-current-time-display, video::-webkit-media-controls-current-time-display,
 audio::-webkit-media-controls-time-remaining-display, video::-webkit-media-controls-time-remaining-display {
     height: 35px;
     line-height: 35px;
@@ skipping 12 matching lines @@
 
 audio::-webkit-media-controls-fullscreen-button {
     display: none;
 }
 
 video::-webkit-media-controls-toggle-closed-captions-button {
     width: 35px;
     height: 35px;
     line-height: 35px;
 }