Update style of media controls popup.

third_party/WebKit/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 343 matching lines @@
 audio::-webkit-media-controls-fullscreen-volume-min-button, video::-webkit-media-controls-fullscreen-volume-min-button {
     display: none;
 }
 
 audio::-webkit-media-controls-fullscreen-volume-max-button, video::-webkit-media-controls-fullscreen-volume-max-button {
     display: none;
 }
 
 video::-internal-media-controls-text-track-list, video::-internal-media-controls-overflow-menu-list, audio::-internal-media-controls-overflow-menu-list {
     position: absolute;
-    bottom: 48px;
-    right: 0px;
+    bottom: 4px;
+    right: 4px;
     background-color: #fafafa;
     max-width: 50%;
     max-height: 250px;
     min-width: 150px;
     overflow-x: hidden;
     overflow-y: auto;
     white-space: nowrap;
     font-size: 14px;
-    padding: 8px 0px;
+    border-radius: 3px;
+    box-shadow: 0px 0px 3px black;
 }
 
 video::-internal-media-controls-text-track-list-item {
     display: block;
     color: #424242;
     text-align: start;
     line-height: 40px;
     padding-right: 16px;
     text-overflow: ellipsis;
 }
@@ skipping 137 matching lines @@
     font-weight: bold;
 }
 
 video::cue(u) {
     text-decoration: underline;
 }
 
 video::cue(i) {
     font-style: italic;
 }