chrome/browser/metrics/variations/variations_request_scheduler_mobile.h

   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   ~VariationsRequestSchedulerMobile() override;
  24
  25   // Base class overrides.
  26   void Start() override;
  27   void Reset() override;
  28   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_