Made ownership of DownloadRequestHandles clear through scoped_ptr<>

content/browser/download/download_item_impl.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_DOWNLOAD_ITEM_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_H_
 #pragma once
 
 #include <string>
 
@@ skipping 75 matching lines @@
   // outlives the DownloadItemImpl.
 
   // Constructing from persistent store:
   // |bound_net_log| is constructed externally for our use.
   DownloadItemImpl(Delegate* delegate,
                    content::DownloadId download_id,
                    const content::DownloadPersistentStoreInfo& info,
                    const net::BoundNetLog& bound_net_log);
 
   // Constructing for a regular download.
-  // Takes ownership of the object pointed to by |request_handle|.
   // |bound_net_log| is constructed externally for our use.
   DownloadItemImpl(Delegate* delegate,
                    const DownloadCreateInfo& info,
-                   DownloadRequestHandleInterface* request_handle,
+                   scoped_ptr<DownloadRequestHandleInterface> request_handle,
                    bool is_otr,
                    const net::BoundNetLog& bound_net_log);
 
   // Constructing for the "Save Page As..." feature:
   // |bound_net_log| is constructed externally for our use.
   DownloadItemImpl(Delegate* delegate,
                    const FilePath& path,
                    const GURL& url,
                    bool is_otr,
                    content::DownloadId download_id,
@@ skipping 320 matching lines @@
 
   // Net log to use for this download.
   const net::BoundNetLog bound_net_log_;
 
   base::WeakPtrFactory<DownloadItemImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadItemImpl);
 };
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_IMPL_H_