(Try 2) Update chrome://newtab checks in browser tests to use chrome::IsNTPURL().

chrome/browser/extensions/lazy_background_page_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 "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/bookmarks/bookmark_model_factory.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/browser_action_test_util.h"
 #include "chrome/browser/extensions/extension_apitest.h"
 #include "chrome/browser/extensions/extension_host.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/browser/extensions/lazy_background_page_test_util.h"
 #include "chrome/browser/profiles/profile.h"
+#include "chrome/browser/search/search.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/omnibox/location_bar.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 244 matching lines @@
 IN_PROC_BROWSER_TEST_F(LazyBackgroundPageApiTest, MAYBE_WaitForNTP) {
   LazyBackgroundObserver lazybg;
   ResultCatcher catcher;
   base::FilePath extdir = test_data_dir_.AppendASCII("lazy_background_page").
       AppendASCII("wait_for_ntp");
   const Extension* extension = LoadExtension(extdir);
   ASSERT_TRUE(extension);
   EXPECT_TRUE(catcher.GetNextResult()) << catcher.message();
 
   // The extension should've opened a new tab to an extension page.
-  EXPECT_EQ(std::string(chrome::kChromeUINewTabURL),
-            browser()->tab_strip_model()->GetActiveWebContents()->
-                GetURL().spec());
+  EXPECT_TRUE(chrome::IsNTPURL(
+      browser()->tab_strip_model()->GetActiveWebContents()->GetURL(),
+      browser()->profile()));
 
   // Lazy Background Page still exists, because the extension created a new tab
   // to an extension page.
   ExtensionProcessManager* pm =
       extensions::ExtensionSystem::Get(browser()->profile())->process_manager();
   EXPECT_TRUE(pm->GetBackgroundHostForExtension(last_loaded_extension_id_));
 
   // Navigate away from the NTP, which should close the event page.
   ui_test_utils::NavigateToURL(browser(), GURL("about:blank"));
   lazybg.Wait();
@@ skipping 201 matching lines @@
       "//iframe[starts-with(@src, 'chrome://extension')]",
       "var ele = document.querySelectorAll('div.active-views');"
       "window.domAutomationController.send("
       "    ele[0].innerHTML.search('(Inactive)') > 0);",
       &is_inactive));
   EXPECT_TRUE(is_inactive);
 }
 
 // TODO: background page with timer.
 // TODO: background page that interacts with popup.