Use explicit case-insensitive attribute-value matching in UA-stylesheets

Source/core/css/themeChromiumLinux.css

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 19 matching lines @@
 
 /* These styles override other user-agent styles for Chromium on Linux. */
 
 select:not([size]):not([multiple]),
 select[size="0"],
 select[size="1"] {
     /* Selects with popup menus look like buttons with a drop down triangle on Linux. */
     background-color: ButtonFace;
 }
 
-input[type=range] {
+input[type=range i] {
     color: #9d968E;
 }