Add ContentSuggestion, ContentSuggestionCategory and ContentSuggestionProviderType

components/ntp_snippets/ntp_snippets_service.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 COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_
 #define COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 45 matching lines @@
   EXPLICITLY_DISABLED,
   // History sync is not enabled, and the service requires it to be enabled.
   HISTORY_SYNC_DISABLED,
   // The sync service is not completely initialized, and the status is unknown.
   HISTORY_SYNC_STATE_UNKNOWN
 };
 
 class NTPSnippetsDatabase;
 class NTPSnippetsServiceObserver;
 
+// TODO IMPORTANT NOTE: This service will move to a sub-namespace and become
+// a SnippetProvider. To access available snippets from outside, please use the
+// "SnippetService".

[Marc Treib, 2016/06/13 13:08:17]

Same thing here.

[Philipp Keck, 2016/06/13 14:13:14]

Done.

+
 // Stores and vends fresh content data for the NTP.
 class NTPSnippetsService : public KeyedService,
                            public sync_driver::SyncServiceObserver {
  public:
   using ImageFetchedCallback =
       base::Callback<void(const std::string& snippet_id, const gfx::Image&)>;
 
   // |application_language_code| should be a ISO 639-1 compliant string, e.g.
   // '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'
@@ skipping 237 matching lines @@
   // or because a requirement (e.g. History Sync) is not fulfilled anymore.
   virtual void NTPSnippetsServiceDisabled() = 0;
 
  protected:
   virtual ~NTPSnippetsServiceObserver() {}
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_