[WIP] Provided file system from NACL.

chrome/browser/chromeos/file_system_provider/file_system_plugin/plugin_service_factory.h

+// Copyright 2015 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_CHROMEOS_FILE_SYSTEM_PROVIDER_PLUGIN_SERVICE_FACTORY_H
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PLUGIN_SERVICE_FACTORY_H
+
+#include <map>
+#include <string>
+
+#include "base/memory/singleton.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+#include "content/public/browser/browser_context.h"
+
+namespace chromeos {
+namespace file_system_provider {
+
+class PluginService;
+
+// Creates plugin services per profile.
+class PluginServiceFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  // Returns a service instance singleton, after creating it, if necessary.
+  static PluginService* Get(content::BrowserContext* context);
+  // Gets a singleton instance of the factory
+  static PluginServiceFactory* GetInstance();
+ private:
+  friend struct DefaultSingletonTraits<PluginServiceFactory>;
+  PluginServiceFactory();
+  ~PluginServiceFactory() override;
+  // BrowserContextKeyedServiceFactory overrides:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const override;
+  bool ServiceIsCreatedWithBrowserContext() const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(PluginServiceFactory);
+};
+
+}  // namespace file_system_provider
+}  // namespace chromeos
+#endif // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_PLUGIN_SERVICE_FACTORY_H