Revert "Initial checkin of accessibility extensions."

ui/accessibility/extensions/highcontrast/common.js

-// Copyright (c) 2014 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.
-
-var DEFAULT_SCHEME = 3;
-var MAX_SCHEME = 5;
-
-function $(id) {
-  return document.getElementById(id);
-}
-
-function getEnabled() {
-  var result = localStorage['enabled'];
-  if (result === 'true' || result === 'false') {
-    return (result === 'true');
-  }
-  localStorage['enabled'] = 'true';
-  return true;
-}
-
-function setEnabled(enabled) {
-  localStorage['enabled'] = enabled;
-}
-
-function getKeyAction() {
-  var keyAction = localStorage['keyaction'];
-  if (keyAction == 'global' || keyAction == 'site') {
-    return keyAction;
-  }
-  keyAction = 'global';
-  localStorage['keyaction'] = keyAction;
-  return keyAction;
-}
-
-function setKeyAction(keyAction) {
-  if (keyAction != 'global' && keyAction != 'site') {
-    keyAction = 'global';
-  }
-  localStorage['keyaction'] = keyAction;
-}
-
-function getDefaultScheme() {
-  var scheme = localStorage['scheme'];
-  if (scheme >= 0 && scheme <= MAX_SCHEME) {
-    return scheme;
-  }
-  scheme = DEFAULT_SCHEME;
-  localStorage['scheme'] = scheme;
-  return scheme;
-}
-
-function setDefaultScheme(scheme) {
-  if (!(scheme >= 0 && scheme <= MAX_SCHEME)) {
-    scheme = DEFAULT_SCHEME;
-  }
-  localStorage['scheme'] = scheme;
-}
-
-function getSiteScheme(site) {
-  var scheme = getDefaultScheme();
-  try {
-    var siteSchemes = JSON.parse(localStorage['siteschemes']);
-    scheme = siteSchemes[site];
-    if (!(scheme >= 0 && scheme <= MAX_SCHEME)) {
-      scheme = getDefaultScheme();
-    }
-  } catch (e) {
-    scheme = getDefaultScheme();
-  }
-  return scheme;
-}
-
-function setSiteScheme(site, scheme) {
-  if (!(scheme >= 0 && scheme <= MAX_SCHEME)) {
-    scheme = getDefaultScheme();
-  }
-  var siteSchemes = {};
-  try {
-    siteSchemes = JSON.parse(localStorage['siteschemes']);
-    siteSchemes['www.example.com'] = getDefaultScheme();
-  } catch (e) {
-    siteSchemes = {};
-  }
-  siteSchemes[site] = scheme;
-  localStorage['siteschemes'] = JSON.stringify(siteSchemes);
-}
-
-function resetSiteSchemes() {
-  var siteSchemes = {};
-  localStorage['siteschemes'] = JSON.stringify(siteSchemes);
-}
-
-function siteFromUrl(url) {
-  var a = document.createElement('a');
-  a.href = url;
-  return a.hostname;
-}
-
-function isDisallowedUrl(url) {
-  return url.indexOf('chrome') == 0 || url.indexOf('about') == 0;
-}