Rewrite download manager unit to be actual unit tests.

content/browser/download/download_item_factory.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.
+//
+// The DownloadItemFactory is used to produce different DownloadItems.
+// It is separate from the DownloadManager to allow download manager
+// unit tests to control the items produced.
+
+#ifndef CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_FACTORY_H_
+#define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_FACTORY_H_
+#pragma once
+
+#include "content/browser/download/download_item_impl.h"
+
+#include <string>
+
+struct DownloadCreateInfo;
+class DownloadRequestHandleInterface;
+class FilePath;
+class GURL;
+
+namespace content {
+class DownloadId;
+class DownloadItem;
+struct DownloadPersistentStoreInfo;
+}
+
+namespace net {
+class BoundNetLog;
+}
+
+namespace content {
+
+class DownloadItemFactory {
+public:
+  virtual ~DownloadItemFactory() {}
+
+  virtual content::DownloadItem* CreatePersistedItem(
+      DownloadItemImpl::Delegate* delegate,
+      content::DownloadId download_id,
+      const content::DownloadPersistentStoreInfo& info,
+      const net::BoundNetLog& bound_net_log) = 0;
+
+  virtual content::DownloadItem* CreateActiveItem(
+      DownloadItemImpl::Delegate* delegate,
+      const DownloadCreateInfo& info,
+      DownloadRequestHandleInterface* request_handle,
+      bool is_otr,
+      const net::BoundNetLog& bound_net_log) = 0;
+
+  virtual content::DownloadItem* CreateSavePageItem(
+      DownloadItemImpl::Delegate* delegate,
+      const FilePath& path,
+      const GURL& url,
+      bool is_otr,
+      content::DownloadId download_id,
+      const std::string& mime_type,
+      const net::BoundNetLog& bound_net_log) = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_ITEM_FACTORY_H_