[Downloads] Always call DM::StartDownload() for explicit downloads.

content/browser/download/download_file_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_file_impl.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
@@ skipping 17 matching lines @@
 
 // These constants control the default retry behavior for failing renames. Each
 // retry is performed after a delay that is twice the previous delay. The
 // initial delay is specified by kInitialRenameRetryDelayMs.
 const int kMaxRenameRetries = 3;
 const int kInitialRenameRetryDelayMs = 200;
 
 int DownloadFile::number_active_objects_ = 0;
 
 DownloadFileImpl::DownloadFileImpl(
-    scoped_ptr<DownloadSaveInfo> save_info,
+    const DownloadSaveInfo& save_info,
     const base::FilePath& default_download_directory,
     const GURL& url,
     const GURL& referrer_url,
     bool calculate_hash,
+    base::File file,
     scoped_ptr<ByteStreamReader> stream,
     const net::BoundNetLog& bound_net_log,
     base::WeakPtr<DownloadDestinationObserver> observer)
-    : file_(save_info->file_path,
+    : file_(save_info.file_path,
             url,
             referrer_url,
-            save_info->offset,
+            save_info.offset,
             calculate_hash,
-            save_info->hash_state,
-            std::move(save_info->file),
+            save_info.hash_state,
+            std::move(file),
             bound_net_log),
       default_download_directory_(default_download_directory),
       stream_reader_(std::move(stream)),
       bytes_seen_(0),
       bound_net_log_(bound_net_log),
       observer_(observer),
       weak_factory_(this) {}
 
 DownloadFileImpl::~DownloadFileImpl() {
   DCHECK_CURRENTLY_ON(BrowserThread::FILE);
@@ skipping 292 matching lines @@
                  observer_, file_.bytes_so_far(), CurrentSpeed(),
                  GetHashState()));
 }
 
 // static
 int DownloadFile::GetNumberOfDownloadFiles() {
   return number_active_objects_;
 }
 
 }  // namespace content