[NTP Snippets] Scheduler: Fetch on Wifi (without charging) only 6AM-10PM

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 <set>
@@ skipping 62 matching lines @@
   // Inherited from KeyedService.
   void Shutdown() override;
 
   // Fetches snippets from the server and adds them to the current ones.
   void FetchSnippets();
 
   // Discards the snippet with the given |url|, if it exists. Returns true iff
   // a snippet was discarded.
   bool DiscardSnippet(const GURL& url);
 
+  // (Re)schedules the periodic fetching of snippets. This is necessary because
+  // the schedule depends on the time of day
+  void RescheduleFetching();
+
   // Observer accessors.
   void AddObserver(NTPSnippetsServiceObserver* observer);
   void RemoveObserver(NTPSnippetsServiceObserver* observer);
 
   // Number of snippets available.
   size_t size() const { return snippets_.size(); }
 
   // The snippets can be iterated upon only via a const_iterator. Recommended
   // way to iterate is as follows:
   //
@@ skipping 32 matching lines @@
   void LoadDiscardedSnippetsFromPrefs();
   void StoreDiscardedSnippetsToPrefs();
 
   std::set<std::string> GetSnippetHostsFromPrefs() const;
   void StoreSnippetHostsToPrefs(const std::set<std::string>& hosts);
 
   bool HasDiscardedSnippet(const GURL& url) const;
 
   void RemoveExpiredSnippets();
 
+  bool enabled_;
+
   PrefService* pref_service_;
 
   suggestions::SuggestionsService* suggestions_service_;
 
   // The SequencedTaskRunner on which file system operations will be run.
   scoped_refptr<base::SequencedTaskRunner> file_task_runner_;
 
   // All current suggestions (i.e. not discarded ones).
   NTPSnippetStorage snippets_;
 
@@ skipping 41 matching lines @@
   // Sent when the service is shutting down.
   virtual void NTPSnippetsServiceShutdown() = 0;
 
  protected:
   virtual ~NTPSnippetsServiceObserver() {}
 };
 
 }  // namespace ntp_snippets
 
 #endif  // COMPONENTS_NTP_SNIPPETS_NTP_SNIPPETS_SERVICE_H_