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
11class PrefService;
12
13namespace chrome_variations {
14
15// A specialized VariationsRequestScheduler that manages request cycles for
16// VariationsService on mobile platforms.
17class 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