Adding Discarded property support for onUpdate function.

chrome/browser/extensions/extension_tabs_apitest.cc

 // 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.
 
 #include "chrome/browser/extensions/extension_apitest.h"
 
 #include "build/build_config.h"
 #include "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 259 matching lines @@
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_GetViewsOfCreatedPopup) {
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "get_views_popup.html"))
       << message_;
 }
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_GetViewsOfCreatedWindow) {
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "get_views_window.html"))
       << message_;
 }
 
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DiscardedState) {
+  ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "discarded.html")) << message_;
+}
+
 // Adding a new test? Awesome. But API tests are the old hotness. The new
 // hotness is extension_function_test_utils. See tabs_test.cc for an example.
 // We are trying to phase out many uses of API tests as they tend to be flaky.