[Downloads] Factor out request handling logic between DRH and UD.

content/browser/download/download_manager_impl.cc

Index: content/browser/download/download_manager_impl.cc
diff --git a/content/browser/download/download_manager_impl.cc b/content/browser/download/download_manager_impl.cc
index 89c63df9e13685d3b8b7ca876d93cfd6c19f7d08..44322c6430c84eb9938d7ffed266bfcf9759d105 100644
--- a/content/browser/download/download_manager_impl.cc
+++ b/content/browser/download/download_manager_impl.cc
@@ -134,10 +134,10 @@ scoped_ptr<UrlDownloader, BrowserThread::DeleteOnIOThread> BeginDownload(
     return nullptr;
   }
   return scoped_ptr<UrlDownloader, BrowserThread::DeleteOnIOThread>(
-      UrlDownloader::BeginDownload(
-          download_manager, request.Pass(), params->referrer(), false,
-          params->prefer_cache(), true, save_info.Pass(), download_id,
-          params->callback())
+      UrlDownloader::BeginDownload(download_manager, request.Pass(),
+                                   params->referrer(), params->prefer_cache(),
+                                   save_info.Pass(), download_id,
+                                   params->callback())
           .release());
 }
 
@@ -378,7 +378,7 @@ void DownloadManagerImpl::StartDownloadWithId(
       // If the download is no longer known to the DownloadManager, then it was
       // removed after it was resumed. Ignore. If the download is cancelled
       // while resuming, then also ignore the request.
-      info->request_handle.CancelRequest();
+      info->request_handle->CancelRequest();
       if (!on_started.is_null())
         on_started.Run(NULL, DOWNLOAD_INTERRUPT_REASON_USER_CANCELED);
       return;
@@ -411,9 +411,7 @@ void DownloadManagerImpl::StartDownloadWithId(
         delegate_->ApplicationClientIdForFileScanning());
   }
 
-  scoped_ptr<DownloadRequestHandleInterface> req_handle(
-      new DownloadRequestHandle(info->request_handle));
-  download->Start(download_file.Pass(), req_handle.Pass());
+  download->Start(download_file.Pass(), info->request_handle.Pass());
 
   // For interrupted downloads, Start() will transition the state to
   // IN_PROGRESS and consumers will be notified via OnDownloadUpdated().