OnDownloadStarted takes DownloadItem* instead of DownloadId

content/public/browser/download_manager.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.
 //
 // 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 browser context in Chrome.
 //
 // Download observers:
@@ skipping 97 matching lines @@
   // clearing |downloads| first.
   virtual void GetAllDownloads(DownloadVector* downloads) = 0;
 
   // Returns true if initialized properly.
   virtual bool Init(BrowserContext* browser_context) = 0;
 
   // Called by a download source (Currently DownloadResourceHandler)
   // to initiate the non-source portions of a download.
   // Returns the id assigned to the download.  If the DownloadCreateInfo
   // specifies an id, that id will be used.
-  virtual DownloadId StartDownload(
+  virtual DownloadItem* StartDownload(
       scoped_ptr<DownloadCreateInfo> info,
       scoped_ptr<ByteStreamReader> stream) = 0;
 
   // Notifications sent from the download thread to the UI thread
   virtual void UpdateDownload(int32 download_id,
                               int64 bytes_so_far,
                               int64 bytes_per_sec,
                               const std::string& hash_state) = 0;
 
   // |download_id| is the ID of the download.
@@ skipping 71 matching lines @@
  protected:
   virtual ~DownloadManager() {}
 
  private:
   friend class base::RefCountedThreadSafe<DownloadManager>;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_DOWNLOAD_MANAGER_H_