Introduce InfoBarTabService API.

chrome/browser/notifications/notification_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/infobars/infobar_tab_helper.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/tab_contents/tab_contents.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
@@ skipping 20 matching lines @@
   // That's considered a user gesture to webkit, and should produce an infobar.
   bool result;
   ASSERT_TRUE(content::ExecuteJavaScriptAndExtractBool(
       chrome::GetActiveWebContents(browser())->GetRenderViewHost(),
       L"",
       L"window.domAutomationController.send(request());",
       &result));
   EXPECT_TRUE(result);
 
   EXPECT_EQ(1U, chrome::GetTabContentsAt(browser(), 0)->infobar_tab_helper()->
-            infobar_count());
+            GetInfoBarCount());
 }
 
 // If this flakes, use http://crbug.com/62311.
 IN_PROC_BROWSER_TEST_F(NotificationsPermissionTest, TestNoUserGestureInfobar) {
   ASSERT_TRUE(test_server()->Start());
 
   // Load a page which just does a request; no user gesture should result
   // in no infobar.
   ui_test_utils::NavigateToURL(
       browser(),
       test_server()->GetURL(
           "files/notifications/notifications_request_inline.html"));
 
   EXPECT_EQ(0U, chrome::GetTabContentsAt(browser(), 0)->infobar_tab_helper()->
-            infobar_count());
+            GetInfoBarCount());
 }