Introduce InfoBarTabService API.

chrome/browser/accessibility/accessibility_extension_api.cc

Index: chrome/browser/accessibility/accessibility_extension_api.cc
diff --git a/chrome/browser/accessibility/accessibility_extension_api.cc b/chrome/browser/accessibility/accessibility_extension_api.cc
index 35cf188e7a98c8cbcb8650565d83febde1990fcc..623f1216446f522cba6dd394490d0435fc83b771 100644
--- a/chrome/browser/accessibility/accessibility_extension_api.cc
+++ b/chrome/browser/accessibility/accessibility_extension_api.cc
@@ -210,7 +210,7 @@ bool GetAlertsForTabFunction::RunImpl() {
   ListValue* alerts_value = new ListValue;
 
   InfoBarTabHelper* infobar_helper = contents->infobar_tab_helper();
-  for (size_t i = 0; i < infobar_helper->infobar_count(); ++i) {
+  for (size_t i = 0; i < infobar_helper->GetInfoBarCount(); ++i) {
     // TODO(hashimoto): Make other kind of alerts available.  crosbug.com/24281
     InfoBarDelegate* infobar_delegate = infobar_helper->GetInfoBarDelegateAt(i);
     ConfirmInfoBarDelegate* confirm_infobar_delegate =