Refactor downloads into a ProfileKeyedService.

chrome/browser/download/download_service_factory.h

+// Copyright (c) 2011 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.
+
+#ifndef CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_FACTORY_H_
+
+#include "base/compiler_specific.h"
+#include "base/memory/singleton.h"
+#include "chrome/browser/profiles/profile_keyed_service_factory.h"
+
+class DownloadService;
+class Profile;
+
+// Singleton that owns all DownloadServices and associates them with
+// Profiles. Listens for the Profile's destruction notification and cleans up
+// the associated DownloadService.
+class DownloadServiceFactory : public ProfileKeyedServiceFactory {
+ public:
+  // Returns the DownloadService for |profile|, creating if not yet created.
+  static DownloadService* GetForProfile(Profile* profile);
+
+  static DownloadServiceFactory* GetInstance();
+
+ protected:
+  // ProfileKeyedServiceFactory:
+  virtual ProfileKeyedService* BuildServiceInstanceFor(
+      Profile* profile) const OVERRIDE;
+  virtual bool ServiceHasOwnInstanceInIncognito() OVERRIDE;
+
+ private:
+  friend struct DefaultSingletonTraits<DownloadServiceFactory>;
+
+  DownloadServiceFactory();
+  virtual ~DownloadServiceFactory();
+};
+
+#endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_FACTORY_H_