Revert 127833 - Re-land alexbost's experimental offscreenTabs API.

chrome/test/data/extensions/api_test/offscreen_tabs/crud.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.
-
-var tabList = [
-  { url: 'a.html', width: 200, height: 200 },
-  { url: 'b.html', width: 200, height: 200 },
-  { url: 'c.html', width: 1000,height: 800 }
-];
-
-// Holds the tab objects once they're created.
-var tabs = [];
-
-chrome.test.runTests([
-  function create() {
-    tabList.forEach(function(tab) {
-      chrome.experimental.offscreenTabs.create(
-          tab, pass(function(offscreenTab) {
-        tabs.push(offscreenTab);
-        assertSimilarTabs(tab, offscreenTab);
-      }));
-    });
-  },
-
-  function getAll() {
-    chrome.experimental.offscreenTabs.getAll(pass(function(offscreenTabs) {
-      var tabSorter = function(tab1, tab2) { return tab1.id - tab2.id; };
-      offscreenTabs.sort(tabSorter);
-      tabs.sort(tabSorter);
-      assertEq(tabs.length, offscreenTabs.length);
-      assertEq(tabs.length, tabList.length);
-      for (var i = 0; i < tabs.length; i++)
-        assertEqTabs(tabs[i], offscreenTabs[i]);
-    }));
-  },
-
-  function get() {
-    chrome.experimental.offscreenTabs.get(tabs[0].id, pass(function(tab) {
-      assertEqTabs(tabs[0], tab);
-    }));
-  },
-
-  function update() {
-    chrome.test.listenOnce(
-        chrome.experimental.offscreenTabs.onUpdated,
-        function(tabId, changeInfo, tab) {
-      assertSimilarTabs(tabList[0], tab);
-    });
-
-    // Update the 2nd tab to be like the 1st one.
-    chrome.experimental.offscreenTabs.update(
-        tabs[1].id, tabList[0], pass(function() {
-      chrome.experimental.offscreenTabs.get(tabs[1].id, pass(function(tab) {
-        assertSimilarTabs(tabList[0], tab);
-      }));
-    }));
-  },
-
-  function remove() {
-    tabs.forEach(function(tab) {
-      chrome.experimental.offscreenTabs.remove(tab.id, pass(function() {
-        assertTabDoesNotExist(tab.id);
-      }));
-    });
-  }
-]);