Avoid file IO on UI thread by moving more save-page-as stuff to the FILE thread.

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 285 matching lines @@
   // Look up SaveItem by save item id from in progress map.
   SaveItem* LookupInProgressSaveItem(SaveItemId save_item_id);
 
   // Remove SaveItem from in progress map and put it to saved map.
   void PutInProgressItemToSavedMap(SaveItem* save_item);
 
   // Retrieves the URL to be saved from the WebContents.
   static GURL GetUrlToBeSaved(WebContents* web_contents);
 
   static base::FilePath CreateDirectoryOnFileThread(
+      const base::string16& title,
+      const GURL& page_url,
+      bool can_save_as_complete,
+      const std::string& mime_type,
       const base::FilePath& website_save_dir,
       const base::FilePath& download_save_dir,
-      const base::FilePath& suggested_filename,
       bool skip_dir_check);
   void ContinueGetSaveInfo(bool can_save_as_complete,
                            const base::FilePath& suggested_path);
   void OnPathPicked(
       const base::FilePath& final_name,
       SavePageType type,
       const SavePackageDownloadCreatedCallback& cb);
 
   // The number of in process SaveItems.
   int in_process_count() const {
     return static_cast<int>(in_progress_items_.size());
   }
 
   // The number of all SaveItems which have completed, including success items
   // and failed items.
   int completed_count() const {
     return static_cast<int>(saved_success_items_.size() +
                             saved_failed_items_.size());
   }
 
   // The current speed in files per second. This is used to update the
   // DownloadItem associated to this SavePackage. The files per second is
   // presented by the DownloadItem to the UI as bytes per second, which is
   // not correct but matches the way the total and received number of files is
   // presented as the total and received bytes.
   int64_t CurrentSpeed() const;
 
   // Helper function for preparing suggested name for the SaveAs Dialog. The
   // suggested name is determined by the web document's title.
-  base::FilePath GetSuggestedNameForSaveAs(
+  static base::FilePath GetSuggestedNameForSaveAs(
+      const base::string16& title,
+      const GURL& page_url,
       bool can_save_as_complete,
       const std::string& contents_mime_type);
 
   // Ensures that the file name has a proper extension for HTML by adding ".htm"
   // if necessary.
   static base::FilePath EnsureHtmlExtension(const base::FilePath& name);
 
   // Ensures that the file name has a proper extension for supported formats
   // if necessary.
   static base::FilePath EnsureMimeExtension(const base::FilePath& name,
@@ skipping 89 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_