Fix instances of passing raw pointers to RefCounted objects in tasks.

chrome/browser/download/download_file_manager.cc

 // Copyright (c) 2010 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_file_manager.h"
 
 #include "base/file_util.h"
 #include "base/stl_util-inl.h"
 #include "base/task.h"
 #include "base/utf_string_conversions.h"
@@ skipping 156 matching lines @@
     ChromeThread::PostTask(
         ChromeThread::IO, FROM_HERE,
         NewRunnableFunction(&download_util::CancelDownloadRequest,
                             resource_dispatcher_host_,
                             info->child_id,
                             info->request_id));
     delete info;
     return;
   }
 
-  ChromeThread::PostTask(ChromeThread::FILE, FROM_HERE,
-      NewRunnableMethod(this, &DownloadFileManager::CreateDownloadFile,
-                        info, manager));
+  ChromeThread::PostTask(
+      ChromeThread::FILE,
+      FROM_HERE,
+      NewRunnableMethod(this,
+                        &DownloadFileManager::CreateDownloadFile,
+                        info,
+                        make_scoped_refptr(manager)));
 }
 
 // We don't forward an update to the UI thread here, since we want to throttle
 // the UI update rate via a periodic timer. If the user has cancelled the
 // download (in the UI thread), we may receive a few more updates before the IO
 // thread gets the cancel message: we just delete the data since the
 // DownloadFile has been deleted.
 void DownloadFileManager::UpdateDownload(int id, DownloadBuffer* buffer) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::FILE));
   std::vector<DownloadBuffer::Contents> contents;
@@ skipping 167 matching lines @@
   if (!download_manager) {
     download->CancelDownloadRequest(resource_dispatcher_host_);
     return;
   }
 
   ChromeThread::PostTask(
       ChromeThread::UI, FROM_HERE,
       NewRunnableMethod(download_manager,
                         &DownloadManager::DownloadCancelled, id));
 }