New media playback UI.

Source/core/css/mediaControlsNew.css

 /*
  * Copyright (C) 2009 Apple Inc.  All rights reserved.
  * Copyright (C) 2015 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
@@ skipping 37 matching lines @@
     align-items: center;
 }
 
 audio::-webkit-media-controls-enclosure, video::-webkit-media-controls-enclosure {
     width: 100%;
     height: 48px;
     flex-shrink: 0;
     bottom: 0;
     text-indent: 0;
     padding: 0;
-    margin: 0;
+    margin: 0px 0px -0.2px 0px;
     box-sizing: border-box;
 }
 
 audio::-webkit-media-controls-panel, video::-webkit-media-controls-panel {
     display: flex;
     flex-direction: row;
     align-items: center;
     /* We use flex-start here to ensure that the play button is visible even
      * if we are too small to show all controls.
      */
     justify-content: flex-start;
     -webkit-user-select: none;
     position: relative;
     width: 100%;
+    margin: 0px 0px -0.2px 0px;
     z-index: 0;
     overflow: hidden;
     text-align: right;
     bottom: auto;
     height: 48px;
     min-width: 48px;
     background-color: #fafafa;
     /* The duration is also specified in MediaControlElements.cpp and LayoutTests/media/media-controls.js */
     transition: opacity 0.3s;
 
@@ skipping 352 matching lines @@
     font-weight: bold;
 }
 
 video::-webkit-media-text-track-container u {
     text-decoration: underline;
 }
 
 video::-webkit-media-text-track-container i {
     font-style: italic;
 }