AutoDiscardable property support on Chrome Extensions Tabs API.

chrome/test/data/extensions/api_test/tabs/basics/discarded.js

-// Copyright 2016 The Chromium Authors. All rights reserved.

[Devlin, 2016/08/11 16:45:54]

To make the diff a little cleaner, can we keep the test files named discarded.*
rather than discarding.*?

[Anderson Silva, 2016/08/11 17:26:57]

Done.

-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-var testTab;
-chrome.test.runTests([
-
-    function setupWindow() {
-      var testTabId;
-
-      createWindow(["about:blank", "chrome://newtab/"], {},
-                   pass(function(winId, tabIds) {
-        testTabId = tabIds[1];
-      }));
-
-      waitForAllTabs(pass(function() {
-        queryForTab(testTabId, {}, pass(function(tab) {
-          testTab = tab;
-        }));
-      }));
-    },
-
-    function discard() {
-      // Initially tab isn't discarded.
-      assertFalse(testTab.discarded);
-
-      var onUpdatedCompleted = chrome.test.listenForever(
-          chrome.tabs.onUpdated,
-          function(tabId, changeInfo, tab) {
-        if ('discarded' in changeInfo) {
-          // Make sure it's the right tab.
-          assertEq(testTab.index, tab.index);
-          assertEq(testTab.windowId, tab.windowId);
-
-          // Make sure the discarded state changed correctly.
-          assertTrue(changeInfo.discarded);
-          assertTrue(tab.discarded);
-
-          onUpdatedCompleted();
-        }
-      });
-
-      // TODO(georgesak): Remove tab update when http://crbug.com/632839 is
-      // resolved.
-      // Discard and update testTab (the id changes after a tab is discarded).
-      chrome.tabs.discard(testTab.id, pass(function(tab) {
-        assertTrue(tab.discarded);
-        testTab = tab;
-      }));
-    },
-
-  function reload() {
-    // Tab is already discarded.
-    assertTrue(testTab.discarded);
-
-    var onUpdatedCompleted = chrome.test.listenForever(
-        chrome.tabs.onUpdated,
-        function(tabId, changeInfo, tab) {
-      if ('discarded' in changeInfo) {
-        // Make sure it's the right tab.
-        assertEq(testTab.index, tab.index);
-        assertEq(testTab.windowId, tab.windowId);
-
-        // Make sure the discarded state changed correctly.
-        assertFalse(changeInfo.discarded);
-        assertFalse(tab.discarded);
-
-        onUpdatedCompleted();
-      }
-    });
-
-    chrome.tabs.reload(testTab.id);
-  }
-]);