Downloads: replace BrowserThread::FILE with task scheduler.

content/browser/download/download_manager_impl.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 "content/browser/download/download_manager_impl.h"
 
 #include <iterator>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 11 matching lines @@
 #include "base/supports_user_data.h"
 #include "base/synchronization/lock.h"
 #include "build/build_config.h"
 #include "content/browser/byte_stream.h"
 #include "content/browser/child_process_security_policy_impl.h"
 #include "content/browser/download/download_create_info.h"
 #include "content/browser/download/download_file_factory.h"
 #include "content/browser/download/download_item_factory.h"
 #include "content/browser/download/download_item_impl.h"
 #include "content/browser/download/download_stats.h"
+#include "content/browser/download/download_task_runner.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_manager_delegate.h"
 #include "content/public/browser/download_url_parameters.h"
 #include "content/public/browser/notification_service.h"
@@ skipping 311 matching lines @@
     auto item_iterator = downloads_.find(id);
     // Trying to resume an interrupted download.
     if (item_iterator == downloads_.end() ||
         (item_iterator->second->GetState() == DownloadItem::CANCELLED)) {
       // If the download is no longer known to the DownloadManager, then it was
       // removed after it was resumed. Ignore. If the download is cancelled
       // while resuming, then also ignore the request.
       info->request_handle->CancelRequest(true);
       if (!on_started.is_null())
         on_started.Run(nullptr, DOWNLOAD_INTERRUPT_REASON_USER_CANCELED);
-      // The ByteStreamReader lives and dies on the FILE thread.
+      // The ByteStreamReader lives and dies on the download sequence.
       if (info->result == DOWNLOAD_INTERRUPT_REASON_NONE)
-        BrowserThread::DeleteSoon(BrowserThread::FILE, FROM_HERE,
-                                  stream.release());
+        GetDownloadTaskRunner()->DeleteSoon(FROM_HERE, stream.release());
       return;
     }
     download = item_iterator->second.get();
   }
 
   base::FilePath default_download_directory;
 #if defined(USE_X11) && !defined(OS_CHROMEOS)
   // TODO(thomasanderson): Remove this when all Linux distros with
   // versions of GTK lower than 3.14.7 are no longer supported.  This
   // should happen when support for Ubuntu Trusty and Debian Jessie
@@ skipping 395 matching lines @@
   if (delegate_)
     delegate_->OpenDownload(download);
 }
 
 void DownloadManagerImpl::ShowDownloadInShell(DownloadItemImpl* download) {
   if (delegate_)
     delegate_->ShowDownloadInShell(download);
 }
 
 }  // namespace content