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      1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_
      6 #define CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_
      7 
      8 #include "base/bind.h"
      9 #include "chrome/browser/metrics/variations/variations_request_scheduler.h"
     10 
     11 class PrefService;
     12 
     13 namespace chrome_variations {
     14 
     15 // A specialized VariationsRequestScheduler that manages request cycles for
     16 // VariationsService on mobile platforms.
     17 class VariationsRequestSchedulerMobile : public VariationsRequestScheduler {
     18  public:
     19   // |task} is the closure to call when the scheduler deems ready. |local_state|
     20   // is the PrefService that contains the time of the last fetch.
     21   explicit VariationsRequestSchedulerMobile(const base::Closure& task,
     22                                             PrefService* local_state);
     23   virtual ~VariationsRequestSchedulerMobile();
     24 
     25   // Base class overrides.
     26   virtual void Start() OVERRIDE;
     27   virtual void Reset() OVERRIDE;
     28   virtual void OnAppEnterForeground() OVERRIDE;
     29 
     30  private:
     31   FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
     32                            OnAppEnterForegroundNoRun);
     33   FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
     34                            OnAppEnterForegroundRun);
     35   FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
     36                            OnAppEnterForegroundOnStartup);
     37 
     38   // The local state instance that provides the last fetch time.
     39   PrefService* local_state_;
     40 
     41   // Timer used for triggering a delayed fetch for ScheduleFetch().
     42   base::OneShotTimer<VariationsRequestSchedulerMobile> schedule_fetch_timer_;
     43 
     44   // The time the last seed request was initiated.
     45   base::Time last_request_time_;
     46 
     47   DISALLOW_COPY_AND_ASSIGN(VariationsRequestSchedulerMobile);
     48 };
     49 
     50 }  // namespace chrome_variations
     51 
     52 #endif  // CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_
     53