Shift "commit point" for when a download will no longer accept cancels.

content/browser/download/download_file_factory.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_factory.h"
+
+#include "content/browser/download/download_file_impl.h"
+#include "content/browser/power_save_blocker.h"
+
+namespace content {
+
+DownloadFileFactory::~DownloadFileFactory() {}
+
+DownloadFile* DownloadFileFactory::CreateFile(
+    DownloadCreateInfo* info,
+    scoped_ptr<content::ByteStreamReader> stream,
+    DownloadManager* download_manager,
+    bool calculate_hash,
+    const net::BoundNetLog& bound_net_log) {
+  return new DownloadFileImpl(
+      info, stream.Pass(), new DownloadRequestHandle(info->request_handle),
+      download_manager, calculate_hash,
+      scoped_ptr<content::PowerSaveBlocker>(
+          new content::PowerSaveBlocker(
+              content::PowerSaveBlocker::kPowerSaveBlockPreventAppSuspension,
+              "Download in progress")).Pass(),
+      bound_net_log);
+}
+
+}  // namespace content