Make chrome.tabs.update's tabId parameter optional.

chrome/browser/extensions/extension_tabs_apitest.cc

 // Copyright (c) 2011 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 "chrome/browser/prefs/incognito_mode_prefs.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
@@ skipping 58 matching lines @@
       prefs::kHomePageIsNewTabPage, true);
 
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "crud.html")) << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, Tabs2) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "crud2.html")) << message_;
 }
 
+IN_PROC_BROWSER_TEST_F(ExtensionApiTest, TabUpdate) {
+  ASSERT_TRUE(StartTestServer());
+  ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "update.html")) << message_;
+}
+
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, TabPinned) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "pinned.html")) << message_;
 }
 
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_TabMove) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "move.html")) << message_;
 }
 
@@ skipping 129 matching lines @@
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_GetViewsOfCreatedPopup) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "get_views_popup.html"))
       << message_;
 }
 IN_PROC_BROWSER_TEST_F(ExtensionApiTest, MAYBE_GetViewsOfCreatedWindow) {
   ASSERT_TRUE(StartTestServer());
   ASSERT_TRUE(RunExtensionSubtest("tabs/basics", "get_views_window.html"))
       << message_;
 }