Implement High Contrast mode for Chrome OS

chrome/browser/resources/options2/browser_options.js

 // Copyright (c) 2012 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.
 
 cr.define('options', function() {
   var OptionsPage = options.OptionsPage;
   var ArrayDataModel = cr.ui.ArrayDataModel;
   var RepeatingButton = cr.ui.RepeatingButton;
 
   //
@@ skipping 446 matching lines @@
         };
       }
       $('cloudPrintManageButton').onclick = function(event) {
         chrome.send('showCloudPrintManagePage');
       };
 
       // Accessibility section (CrOS only).
       if (cr.isChromeOS) {
         $('accessibility-spoken-feedback-check').onchange = function(event) {
           chrome.send('spokenFeedbackChange',
-          [$('accessibility-spoken-feedback-check').checked]);
+                      [$('accessibility-spoken-feedback-check').checked]);
+        };
+
+        $('accessibility-high-contrast-check').onchange = function(event) {
+          chrome.send('highContrastChange',
+                      [$('accessibility-high-contrast-check').checked]);
         };
       }
 
       // Background mode section.
       if ($('backgroundModeCheckbox')) {
         cr.defineProperty($('backgroundModeCheckbox'),
             'controlledBy',
             cr.PropertyKind.ATTR);
         $('backgroundModeCheckbox').onclick = function(event) {
           chrome.send('backgroundModeAction',
@@ skipping 727 matching lines @@
      */
     setSpokenFeedbackCheckboxState_: function(checked) {
       $('accessibility-spoken-feedback-check').checked = checked;
     },
 
     /**
      * Set the initial state of the high contrast checkbox.
      * @private
      */
     setHighContrastCheckboxState_: function(checked) {
-      // TODO(zork): Update UI
+      $('accessibility-high-contrast-check').checked = checked;
     },
 
     /**
      * Set the initial state of the screen magnifier checkbox.
      * @private
      */
     setScreenMagnifierCheckboxState_: function(checked) {
       // TODO(zork): Update UI
     },
 
@@ skipping 169 matching lines @@
     BrowserOptions.getLoggedInUsername = function() {
       return BrowserOptions.getInstance().username_;
     };
   }
 
   // Export
   return {
     BrowserOptions: BrowserOptions
   };
 });