Creating the NTP snippet service.

components/ntp_snippets/ntp_snippets_service.h

Index: components/ntp_snippets/ntp_snippets_service.h
diff --git a/components/ntp_snippets/ntp_snippets_service.h b/components/ntp_snippets/ntp_snippets_service.h
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+// 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 COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_
+#define COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "components/keyed_service/core/keyed_service.h"
+
+namespace ntp_snippets {
+
+// Stores and vend fresh content data for the NTP.
+class NTPSnippetsService : public KeyedService {
+ public:
+  // |application_language_code| should be a ISO 639-1 compliant string. Aka
+  // 'en' or 'en-US'. Note that this code should only specify the language, not
+  // the locale, so 'en_US' (english language with US locale) and 'en-GB_US'
+  // (British english person in the US) are not language code.
+  explicit NTPSnippetsService(const std::string& application_language_code);
+  ~NTPSnippetsService() override;
+
+  void Shutdown() override;
+
+  // TODO(crbug.com/547046): Add API.
+ private:
+  // The ISO 639-1 code of the language used by the application.
+  const std::string application_language_code_;
+
+  DISALLOW_COPY_AND_ASSIGN(NTPSnippetsService);
+};
+
+}  // namespace ntp_snippets
+
+#endif  // COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_