arc: Initial implemetation of Chrome sync for Arc packages.

chrome/browser/ui/app_list/arc/arc_package_syncable_service_factory.h

Index: chrome/browser/ui/app_list/arc/arc_package_syncable_service_factory.h
diff --git a/chrome/browser/ui/app_list/arc/arc_package_syncable_service_factory.h b/chrome/browser/ui/app_list/arc/arc_package_syncable_service_factory.h
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+// Copyright 2016 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_UI_APP_LIST_ARC_ARC_PACKAGE_SYNCABLE_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_UI_APP_LIST_ARC_ARC_PACKAGE_SYNCABLE_SERVICE_FACTORY_H_
+
+#include <memory>
+
+#include "base/macros.h"
+#include "base/memory/singleton.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+namespace arc {
+
+class ArcPackageSyncableService;
+
+class ArcPackageSyncableServiceFactory
+    : public BrowserContextKeyedServiceFactory {
+ public:
+  static ArcPackageSyncableService* GetForBrowserContext(
+      content::BrowserContext* context);
+
+  static ArcPackageSyncableServiceFactory* GetInstance();
+
+ private:
+  friend struct base::DefaultSingletonTraits<ArcPackageSyncableServiceFactory>;
+
+  ArcPackageSyncableServiceFactory();
+  ~ArcPackageSyncableServiceFactory() override;
+
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(ArcPackageSyncableServiceFactory);
+};
+
+}  // namespace arc
+
+#endif  // CHROME_BROWSER_UI_APP_LIST_ARC_ARC_PACKAGE_SYNCABLE_SERVICE_FACTORY_H_