Made ownership of DownloadRequestHandles clear through scoped_ptr<>

content/browser/download/download_item_impl.cc

 // 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.
 
 #include "content/browser/download/download_item_impl.h"
 
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 191 matching lines @@
   if (IsComplete())
     all_data_saved_ = true;
   Init(false /* not actively downloading */,
        download_net_logs::SRC_HISTORY_IMPORT);
 }
 
 // Constructing for a regular download:
 DownloadItemImpl::DownloadItemImpl(
     Delegate* delegate,
     const DownloadCreateInfo& info,
-    DownloadRequestHandleInterface* request_handle,
+    scoped_ptr<DownloadRequestHandleInterface> request_handle,
     bool is_otr,
     const net::BoundNetLog& bound_net_log)
-    : request_handle_(request_handle),
+    : request_handle_(request_handle.Pass()),
       download_id_(info.download_id),
       target_disposition_(
           (info.prompt_user_for_save_location) ?
               TARGET_DISPOSITION_PROMPT : TARGET_DISPOSITION_OVERWRITE),
       url_chain_(info.url_chain),
       referrer_url_(info.referrer_url),
       suggested_filename_(UTF16ToUTF8(info.save_info.suggested_name)),
       forced_file_path_(info.save_info.file_path),
       transition_type_(info.transition_type),
       has_user_gesture_(info.has_user_gesture),
@@ skipping 976 matching lines @@
   std::map<const void*, ExternalData*>::iterator it =
       external_data_map_.find(key);
 
   if (it == external_data_map_.end()) {
     external_data_map_[key] = data;
   } else if (it->second != data) {
     delete it->second;
     it->second = data;
   }
 }