Refactor downloads into a ProfileKeyedService.

chrome/browser/download/download_service_factory.cc

+// 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.
+
+#include "chrome/browser/download/download_service_factory.h"
+
+#include "chrome/browser/download/download_service.h"
+#include "chrome/browser/profiles/profile_dependency_manager.h"
+
+// static
+DownloadService* DownloadServiceFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<DownloadService*>(
+      GetInstance()->GetServiceForProfile(profile, true));
+}
+
+// static
+DownloadServiceFactory* DownloadServiceFactory::GetInstance() {
+  return Singleton<DownloadServiceFactory>::get();
+}
+
+DownloadServiceFactory::DownloadServiceFactory()
+    : ProfileKeyedServiceFactory(
+        ProfileDependencyManager::GetInstance()) {
+  // TODO(rdsmith): For Shutdown() order we need to:
+  //    DependsOn(HistoryServiceDataFactory::GetInstance());
+}
+
+DownloadServiceFactory::~DownloadServiceFactory() {
+}
+
+ProfileKeyedService* DownloadServiceFactory::BuildServiceInstanceFor(
+    Profile* profile) const {
+  DownloadService* service = new DownloadService(profile);
+
+  // No need for initialization; initialization can be done on first
+  // use of service.
+
+  return service;
+}
+
+bool DownloadServiceFactory::ServiceHasOwnInstanceInIncognito() {
+  return true;
+}