Merge 116900 - Volume slider needs to be displayed below the mute button

Source/WebCore/css/mediaControlsQuickTime.css

 /*
  * Copyright (C) 2009, 2010, 2011 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 32 matching lines @@
 audio::-webkit-media-controls-mute-button, video::-webkit-media-controls-mute-button {
     -webkit-box-ordinal-group: 2; /* Before the fullscreen button */
 
     width: 14px;
     height: 12px;
     margin-left: 2px;
     margin-right: 9px;
     border: none !important;
 
     position: relative;
-    z-index: 2;
+    z-index: 1;
 }
 
 audio::-webkit-media-controls-play-button, video::-webkit-media-controls-play-button {
     width: 16px;
     height: 16px;
     margin-left: 6px;
     margin-right: 1px;
     border: none !important;
 }
 
@@ skipping 133 matching lines @@
     margin-right: 7px;
     -webkit-box-ordinal-group: 3; /* between mute and fullscreen */
     border: none !important;
 }
 
 audio::-webkit-media-controls-volume-slider-container, video::-webkit-media-controls-volume-slider-container {
     -webkit-appearance: media-volume-slider-container;
     position: absolute;
 
     bottom: 0px;
-    z-index: 1;
+    z-index: 2;
 
     width: 22px;
     height: 114px;
 }
 
 audio::-webkit-media-controls-volume-slider, video::-webkit-media-controls-volume-slider {
     -webkit-appearance: media-volume-slider;
     display: inline;
     position: absolute;
 
     top: 7px;
     left: 6px;
 
     width: 10px;
     height: 80px;
 }
+
+audio::-webkit-media-controls-volume-slider-mute-button, video::-webkit-media-controls-volume-slider-mute-button {
+    -webkit-appearance: media-volume-slider-mute-button;
+    display: inline;
+
+    position: absolute;
+
+    bottom: 7px;
+    left: 0px;
+
+    width: 14px;
+    height: 12px;
+
+    margin-left: 2px;
+    margin-right: 9px;
+
+    border: none !important;
+}