DownloadManager intereface refactoring to allow cleaner DownloadItem unit tests.

chrome/browser/download/download_shelf_context_menu.cc

 // Copyright (c) 2011 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_shelf_context_menu.h"
 
 #include "chrome/browser/download/download_item_model.h"
 #include "chrome/browser/download/download_prefs.h"
 #include "chrome/common/extensions/extension.h"
 #include "content/browser/download/download_item.h"
@@ skipping 45 matching lines @@
 
 void DownloadShelfContextMenu::ExecuteCommand(int command_id) {
   switch (command_id) {
     case SHOW_IN_FOLDER:
       download_item_->ShowDownloadInShell();
       break;
     case OPEN_WHEN_COMPLETE:
       download_item_->OpenDownload();
       break;
     case ALWAYS_OPEN_TYPE: {
-      DownloadPrefs* prefs = DownloadPrefs::FromDownloadManager(
-          download_item_->GetDownloadManager());
+      DownloadPrefs* prefs = DownloadPrefs::FromBrowserContext(
+          download_item_->BrowserContext());
       FilePath path = download_item_->GetUserVerifiedFilePath();
       if (!IsCommandIdChecked(ALWAYS_OPEN_TYPE))
         prefs->EnableAutoOpenBasedOnExtension(path);
       else
         prefs->DisableAutoOpenBasedOnExtension(path);
       break;
     }
     case CANCEL:
       download_model_->CancelTask();
       break;
@@ skipping 76 matching lines @@
       ALWAYS_OPEN_TYPE, IDS_DOWNLOAD_MENU_ALWAYS_OPEN_TYPE);
   finished_download_menu_model_->AddSeparator();
   finished_download_menu_model_->AddItemWithStringId(
       SHOW_IN_FOLDER, IDS_DOWNLOAD_MENU_SHOW);
   finished_download_menu_model_->AddSeparator();
   finished_download_menu_model_->AddItemWithStringId(
       CANCEL, IDS_DOWNLOAD_MENU_CANCEL);
 
   return finished_download_menu_model_.get();
 }