Creating the NTP snippet service.

chrome/browser/ntp_snippets/ntp_snippets_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_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+class Profile;
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}  // namespace base
+
+namespace ntp_snippets {
+class NTPSnippetsService;
+}  // namespace ntp_snippets
+
+// A factory to create NTPSnippetsService and associate them to its browser
+// context.
+class NTPSnippetsServiceFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  static NTPSnippetsServiceFactory* GetInstance();
+  static ntp_snippets::NTPSnippetsService* GetForProfile(Profile* profile);
+
+ private:
+  friend struct base::DefaultSingletonTraits<NTPSnippetsServiceFactory>;
+
+  NTPSnippetsServiceFactory();
+  ~NTPSnippetsServiceFactory() override;
+
+  // BrowserStateKeyedServiceFactory implementation.
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(NTPSnippetsServiceFactory);
+};
+
+#endif  // CHROME_BROWSER_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_FACTORY_H_