Upstream iOS SuggestionsServiceFactory

ios/chrome/browser/suggestions/suggestions_service_factory.h

+// Copyright 2014 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 IOS_CHROME_BROWSER_SUGGESTIONS_SUGGESTIONS_SERVICE_FACTORY_H_
+#define IOS_CHROME_BROWSER_SUGGESTIONS_SUGGESTIONS_SERVICE_FACTORY_H_
+
+#include "base/macros.h"
+#include "components/keyed_service/ios/browser_state_keyed_service_factory.h"
+
+template <typename T>
+struct DefaultSingletonTraits;
+
+namespace web {
+class BrowserState;
+}
+
+namespace suggestions {
+
+class SuggestionsService;
+
+// Singleton that owns all SuggestionsServices and associates them with
+// web::BrowserState.
+class SuggestionsServiceFactory : public BrowserStateKeyedServiceFactory {
+ public:
+  static SuggestionsServiceFactory* GetInstance();
+
+  // Returns the SuggestionsService for |browser_state|.
+  static SuggestionsService* GetForBrowserState(
+      web::BrowserState* browser_state);
+
+ private:
+  friend struct DefaultSingletonTraits<SuggestionsServiceFactory>;
+
+  SuggestionsServiceFactory();
+  ~SuggestionsServiceFactory();
+
+  // BrowserStateKeyedServiceFactory:
+  KeyedService* BuildServiceInstanceFor(
+      web::BrowserState* browser_state) const override;
+  void RegisterProfilePrefs(
+      user_prefs::PrefRegistrySyncable* registry) override;
+
+  DISALLOW_COPY_AND_ASSIGN(SuggestionsServiceFactory);
+};
+
+}  // namespace suggestions
+
+#endif  // IOS_CHROME_BROWSER_SUGGESTIONS_SUGGESTIONS_SERVICE_FACTORY_H_