Change infobar creation to use a public static Create() method on the infobar delegate classes.

chrome/browser/download/download_request_limiter.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/download/download_request_limiter.h"
 
 #include "base/bind.h"
 #include "base/stl_util.h"
 #include "chrome/browser/api/infobars/infobar_service.h"
 #include "chrome/browser/download/download_request_infobar_delegate.h"
@@ skipping 88 matching lines @@
     // WebContents like those used for extension popups/bubbles and hosted apps
     // etc.
     // TODO(benjhayden): If this is an automatic download from an extension,
     // it would be convenient for the extension author if we send a message to
     // the extension's DevTools console (as we do for CSP) about how
     // extensions should use chrome.downloads.download() (requires the
     // "downloads" permission) to automatically download >1 files.
     Cancel();
     return;
   }
-  infobar_ = new DownloadRequestInfoBarDelegate(infobar_service, this);
-  infobar_service->AddInfoBar(infobar_);
+  DownloadRequestInfoBarDelegate::Create(infobar_service, this);
 }
 
 void DownloadRequestLimiter::TabDownloadState::Cancel() {
   NotifyCallbacks(false);
 }
 
 void DownloadRequestLimiter::TabDownloadState::Accept() {
   NotifyCallbacks(true);
 }
 
@@ skipping 227 matching lines @@
 
 void DownloadRequestLimiter::Remove(TabDownloadState* state) {
   DCHECK(ContainsKey(state_map_, state->web_contents()));
   state_map_.erase(state->web_contents());
   delete state;
 }
 
 // static
 DownloadRequestLimiter::TestingDelegate* DownloadRequestLimiter::delegate_ =
     NULL;