Devtools: Add new row in toolbarButtonGlyphs and layout editor icon

Source/devtools/front_end/ui/smallIcon.css

 /*
  * Copyright (c) 2015 The Chromium Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 div {
     width: 10px;
     height: 10px;
     margin-right: 2px;
     display: inline-block;
 }
 
 div.error-icon,
 div.revokedError-icon,
 div.warning-icon,
 div.info-icon,
 div.device-icon,
 div.red-ball,
 div.green-ball,
 div.orange-ball {
     background-image: url(Images/toolbarButtonGlyphs.png);
-    background-size: 352px 144px;
+    background-size: 352px 168px;
 }
 
 @media (-webkit-min-device-pixel-ratio: 1.5) {
 div.error-icon,
 div.revokedError-icon,
 div.warning-icon,
 div.info-icon,
 div.device-icon,
 div.red-ball,
 div.green-ball,
@@ skipping 26 matching lines @@
     background-position: -224px -96px;
 }
 
 div.green-ball {
     background-position: -235px -96px;
 }
 
 div.orange-ball {
     background-position: -246px -96px;
 }