Creating the NTP snippet service.

chrome/browser/ntp_suggestions/ntp_suggestions_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_SUGGESTIONS_NTP_SUGGESTIONS_SERVICE_FACTORY_H_
+#define CHROME_BROWSER_NTP_SUGGESTIONS_NTP_SUGGESTIONS_SERVICE_FACTORY_H_
+
+#include "base/macros.h"
+#include "base/memory/scoped_ptr.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+namespace base {
+template <typename T>
+struct DefaultSingletonTraits;
+}  // namespace base
+
+namespace ntp_suggestions {
+class NTPSuggestionsService;
+}  // namespace ntp_suggestions
+
+// A factory to create NTPSuggestionsService and associate them to its browser
+// context.
+class NTPSuggestionsServiceFactory : public BrowserContextKeyedServiceFactory {
+ public:
+  static NTPSuggestionsServiceFactory* GetInstance();
+  static ntp_suggestions::NTPSuggestionsService* GetForBrowserContext(

[sdefresne, 2015/11/17 13:57:29]

Usually the BrowserContextKeyedServiceFactory do define a
"GetForProfile(Profile* profile)" method. This is recommended if you ever cast
the context to a Profile* in the implementation (which you indirectly do by
calling chrome::GetBrowserContextRedirectedInIncognito).

[noyau (Ping after 24h), 2015/11/17 17:00:33]

Done.

+      content::BrowserContext* context);
+
+ private:
+  friend struct base::DefaultSingletonTraits<NTPSuggestionsServiceFactory>;
+
+  NTPSuggestionsServiceFactory();
+  ~NTPSuggestionsServiceFactory() override;
+
+  // BrowserStateKeyedServiceFactory implementation.
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* context) const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+
+  DISALLOW_COPY_AND_ASSIGN(NTPSuggestionsServiceFactory);
+};
+
+#endif  // CHROME_BROWSER_NTP_SUGGESTIONS_NTP_SUGGESTIONS_SERVICE_FACTORY_H_