Introduce InfoBarTabService API.

chrome/browser/ui/cocoa/keystone_infobar_delegate.mm

 // 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/ui/cocoa/keystone_infobar_delegate.h"
 
 #import <AppKit/AppKit.h>
 
 #include <string>
 
@@ skipping 180 matching lines @@
   if (status != kAutoupdateRegisterFailed &&
       [[KeystoneGlue defaultKeystoneGlue] needsPromotion]) {
     Browser* browser = browser::GetLastActiveBrowser();
     if (browser) {
       TabContents* tabContents = chrome::GetActiveTabContents(browser);
 
       // Only show if no other info bars are showing, because that's how the
       // default browser info bar works.
       if (tabContents) {
         InfoBarTabHelper* infobar_helper = tabContents->infobar_tab_helper();
-        if (infobar_helper->infobar_count() == 0) {
+        if (infobar_helper->GetInfoBarCount() == 0) {
           infobar_helper->AddInfoBar(
               new KeystonePromotionInfoBarDelegate(
                   infobar_helper,
                   tabContents->profile()->GetPrefs()));
         }
       }
     }
   }
 
   [self release];
 }
 
 - (void)removeObserver {
   [[NSNotificationCenter defaultCenter] removeObserver:self];
 }
 
 @end  // @implementation KeystonePromotionInfoBar
 
 // static
 void KeystoneInfoBar::PromotionInfoBar(Profile* profile) {
   KeystonePromotionInfoBar* promotionInfoBar =
       [[[KeystonePromotionInfoBar alloc] init] autorelease];
 
   [promotionInfoBar checkAndShowInfoBarForProfile:profile];
 }