Fix leak of a DownloadItem in SavePackage::Init.

chrome/browser/download/download_manager.h

 // Copyright (c) 2010 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.
 //
 // The DownloadManager object manages the process of downloading, including
 // updates to the history system and providing the information for displaying
 // the downloads view in the Destinations tab. There is one DownloadManager per
 // active profile in Chrome.
 //
 // Download observers:
@@ skipping 117 matching lines @@
 
   // Remove downloads will delete all downloads that have a timestamp that is
   // the same or more recent than |remove_begin|. The number of downloads
   // deleted is returned back to the caller.
   int RemoveDownloads(const base::Time remove_begin);
 
   // Remove all downloads will delete all downloads. The number of downloads
   // deleted is returned back to the caller.
   int RemoveAllDownloads();
 
-  // Called when a Save Page As download is started.
+  // Called when a Save Page As download is started. Transfers ownership
+  // of |download_item| to the DownloadManager.
   void SavePageAsDownloadStarted(DownloadItem* download_item);
 
   // Download the object at the URL. Used in cases such as "Save Link As..."
   void DownloadUrl(const GURL& url,
                    const GURL& referrer,
                    const std::string& referrer_encoding,
                    TabContents* tab_contents);
 
   // Download the object at the URL and save it to the specified path. The
   // download is treated as the temporary download and thus will not appear
@@ skipping 197 matching lines @@
   // The "Save As" dialog box used to ask the user where a file should be
   // saved.
   scoped_refptr<SelectFileDialog> select_file_dialog_;
 
   scoped_ptr<OtherDownloadManagerObserver> other_download_manager_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManager);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_H_