Revert "Initial checkin of accessibility extensions."

ui/accessibility/extensions/longdesc/background.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 ariaDescribedAt = '';
-var longDesc = '';
-
- /**
- * This is called when the extension is first loaded, so that it can be
- * immediately used in all already-open tabs. It's not needed for any
- * new tabs that open after that, the content script will be automatically
- * injected into any new tab.
- */
-chrome.windows.getAll({'populate': true}, function(windows) {
-  for (var i = 0; i < windows.length; i++) {
-    var tabs = windows[i].tabs;
-    for (var j = 0; j < tabs.length; j++) {
-      chrome.tabs.executeScript(
-        tabs[j].id,
-        {file: 'lastRightClick.js'});
-    }
-  }
-});
-
-/**
- * Add context menu item when the extension is installed.
- */
-chrome.contextMenus.create({
-    "title": "More information...",
-    "contexts": ["all"],
-    "id": "moreInfo",
-    "onclick": contextMenuClicked,
-    "enabled": false
-  });
-
-/**
- * Add listener for messages from content script.
- * Enable/disable the context menu item.
- */
-chrome.runtime.onMessage.addListener(
-  function (request, sender, sendResponse) {
-    if (request.enabled) {
-      ariaDescribedAt = request.ariaDescribedAt;
-      longDesc = request.longDesc;
-    }
-    chrome.contextMenus.update('moreInfo', {
-      "enabled": request.enabled
-    });
-  });
-
-/**
- * Event handler for when a context menu item is clicked.
- * aria-describedat is given a higher priority.
- * No need to strip the URL of leading/trailing white space
- * because Chrome takes care of this.
- *
- * @param info
- * @param tab
- */
-function contextMenuClicked(info, tab) {
-  if (ariaDescribedAt !== '') {
-    chrome.tabs.create({url: ariaDescribedAt});
-  } else if (longDesc !== '') {
-    chrome.tabs.create({url: longDesc});
-  }
-}