Remove dependency of infobars component on the embedder

ios/chrome/browser/infobars/confirm_infobar_delegate.mm

-// Copyright 2014 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 "components/infobars/core/confirm_infobar_delegate.h"
-
-#include "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
-#include "ios/chrome/browser/infobars/confirm_infobar_controller.h"
-#include "ios/chrome/browser/infobars/infobar.h"
-
-// This function is defined in the component, but implemented in the embedder.
-// static
-scoped_ptr<infobars::InfoBar> ConfirmInfoBarDelegate::CreateInfoBar(
-    scoped_ptr<ConfirmInfoBarDelegate> delegate) {
-  scoped_ptr<InfoBarIOS> infobar(new InfoBarIOS(delegate.Pass()));
-  base::scoped_nsobject<ConfirmInfoBarController> controller(
-      [[ConfirmInfoBarController alloc] initWithDelegate:infobar.get()]);
-  infobar->SetController(controller);
-  return infobar.Pass();
-}