Downloads: replace BrowserThread::FILE with task scheduler.

content/browser/download/save_package.h

 // 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.
 
 #ifndef CONTENT_BROWSER_DOWNLOAD_SAVE_PACKAGE_H_
 #define CONTENT_BROWSER_DOWNLOAD_SAVE_PACKAGE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 82 matching lines @@
   // g_browser_process on a non-UI thread can cause crashes during shutdown.
   // |cb| will be called when the DownloadItem is created, before data is
   // written to disk.
   bool Init(const SavePackageDownloadCreatedCallback& cb);
 
   // Cancel all in progress request, might be called by user or internal error.
   void Cancel(bool user_action, bool cancel_download_item = true);
 
   void Finish();
 
-  // Notifications sent from the FILE thread to the UI thread.
+  // Notifications sent from the download sequence to the UI thread.
   void StartSave(const SaveFileCreateInfo* info);
   bool UpdateSaveProgress(SaveItemId save_item_id,
                           int64_t size,
                           bool write_success);
   // Called for updating end state.
   void SaveFinished(SaveItemId save_item_id, int64_t size, bool is_success);
   void SaveCanceled(const SaveItem* save_item);
 
   // Calculate the percentage of whole save page job.
   // Rough percent complete, -1 means we don't know (since we didn't receive a
@@ skipping 265 matching lines @@
   // etc.
   std::unordered_map<int, std::vector<SaveItem*>>
       frame_tree_node_id_to_contained_save_items_;
 
   // Number of frames that we still need to get a response from.
   int number_of_frames_pending_response_ = 0;
 
   // Map of all saving job which are successfully saved.
   SaveItemIdMap saved_success_items_;
 
-  // Non-owning pointer for handling file writing on the FILE thread.
+  // Non-owning pointer for handling file writing on the download sequence.
   SaveFileManager* file_manager_ = nullptr;
 
   // DownloadManager owns the DownloadItem and handles history and UI.
   DownloadManagerImpl* download_manager_ = nullptr;
   DownloadItemImpl* download_ = nullptr;
 
   // The URL of the page the user wants to save.
   GURL page_url_;
   base::FilePath saved_main_file_path_;
   base::FilePath saved_main_directory_path_;
@@ skipping 36 matching lines @@
 
   // Unique ID for this SavePackage.
   const SavePackageId unique_id_;
 
   DISALLOW_COPY_AND_ASSIGN(SavePackage);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_SAVE_PACKAGE_H_