Refactor downloads into a ProfileKeyedService.

content/browser/download/download_manager.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 "content/browser/download/download_manager.h"
 
 #include <iterator>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 595 matching lines @@
   // Clean up will happen when the history system create callback runs if we
   // don't have a valid db_handle yet.
   if (download->db_handle() != DownloadItem::kUninitializedHandle) {
     in_progress_.erase(download->id());
     active_downloads_.erase(download->id());
     UpdateDownloadProgress();  // Reflect removal from in_progress_.
     delegate_->UpdateItemInPersistentStore(download);
   }
 }
 
+void DownloadManager::SetDownloadManagerDelegate(
+    DownloadManagerDelegate* delegate) {
+  delegate_ = delegate;
+}
+
 void DownloadManager::UpdateDownloadProgress() {
   delegate_->DownloadProgressUpdated();
 }
 
 int DownloadManager::RemoveDownloadItems(
     const DownloadVector& pending_deletes) {
   if (pending_deletes.empty())
     return 0;
 
   // Delete from internal maps.
@@ skipping 435 matching lines @@
     DCHECK(ContainsKey(save_page_downloads_, download->id()));
     save_page_downloads_.erase(download->id());
 
     if (download->IsComplete())
       NotificationService::current()->Notify(
           content::NOTIFICATION_SAVE_PACKAGE_SUCCESSFULLY_FINISHED,
           Source<DownloadManager>(this),
           Details<DownloadItem>(download));
   }
 }