Introduce InfoBarTabService API.

chrome/browser/infobars/infobars_browsertest.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/crx_installer.h"
 #include "chrome/browser/extensions/extension_install_prompt.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/infobars/infobar_tab_helper.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/themes/theme_service.h"
@@ skipping 58 matching lines @@
         chrome::NOTIFICATION_TAB_CONTENTS_INFOBAR_ADDED,
         content::NotificationService::AllSources());
   content::WindowedNotificationObserver infobar_removed_1(
       chrome::NOTIFICATION_TAB_CONTENTS_INFOBAR_REMOVED,
         content::NotificationService::AllSources());
   InstallExtension("theme2.crx");
   infobar_added_2.Wait();
   infobar_removed_1.Wait();
   EXPECT_EQ(0u,
             chrome::GetTabContentsAt(browser(), 0)->infobar_tab_helper()->
-                infobar_count());
+                GetInfoBarCount());
 
   content::WindowedNotificationObserver infobar_removed_2(
       chrome::NOTIFICATION_TAB_CONTENTS_INFOBAR_REMOVED,
         content::NotificationService::AllSources());
   ThemeServiceFactory::GetForProfile(browser()->profile())->UseDefaultTheme();
   infobar_removed_2.Wait();
   EXPECT_EQ(0u,
             chrome::GetActiveTabContents(browser())->infobar_tab_helper()->
-                infobar_count());
+                GetInfoBarCount());
 }