Adding Discarded property support for onUpdate function.

chrome/browser/extensions/extension_tabs_apitest.cc

Index: chrome/browser/extensions/extension_tabs_apitest.cc
diff --git a/chrome/browser/extensions/extension_tabs_apitest.cc b/chrome/browser/extensions/extension_tabs_apitest.cc
index 87690c430c6c4af645901f7480a4381edb846136..1ed844e4974d41b3553f97346a5e1267258a9c4a 100644
--- a/chrome/browser/extensions/extension_tabs_apitest.cc
+++ b/chrome/browser/extensions/extension_tabs_apitest.cc
@@ -277,6 +277,10 @@ IN_PROC_BROWSER_TEST_F(ExtensionApiTest, DISABLED_GetViewsOfCreatedWindow) {
       << 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.