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diff --git a/chromium/components/variations/variations_request_scheduler.h b/chromium/components/variations/variations_request_scheduler.h
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+// Copyright (c) 2013 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_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_H_
+#define COMPONENTS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_H_
+
+#include "base/bind.h"
+#include "base/gtest_prod_util.h"
+#include "base/macros.h"
+#include "base/time/time.h"
+#include "base/timer/timer.h"
+
+class PrefService;
+
+namespace variations {
+
+// A helper class that makes VariationsService requests at the correct times.
+class VariationsRequestScheduler {
+ public:
+  virtual ~VariationsRequestScheduler();
+
+  // Starts the task. This can be a repeated event or a one-off.
+  virtual void Start();
+
+  // Resets the scheduler if it is currently on a timer.
+  virtual void Reset();
+
+  // Schedules a fetch shortly, for example to re-try the initial request which
+  // may have failed.
+  void ScheduleFetchShortly();
+
+  // Called when the application has been foregrounded. This may fetch a new
+  // seed.
+  virtual void OnAppEnterForeground();
+
+  // Factory method for this class.
+  static VariationsRequestScheduler* Create(const base::Closure& task,
+                                            PrefService* local_state);
+
+ protected:
+  // |task| is the closure to call when the scheduler deems ready.
+  explicit VariationsRequestScheduler(const base::Closure& task);
+
+  // Returns the time interval between variations seed fetches.
+  base::TimeDelta GetFetchPeriod() const;
+
+  // Getter for derived classes.
+  base::Closure task() const;
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerTest,
+                           ScheduleFetchShortly);
+
+  // The task scheduled by this class.
+  base::Closure task_;
+
+  // The timer used to repeatedly ping the server. Keep this as an instance
+  // member so if VariationsRequestScheduler goes out of scope, the timer is
+  // automatically canceled.
+  base::RepeatingTimer timer_;
+
+  // A one-shot timer used for scheduling out-of-band fetches.
+  base::OneShotTimer one_shot_timer_;
+
+  DISALLOW_COPY_AND_ASSIGN(VariationsRequestScheduler);
+};
+
+}  // namespace variations
+
+#endif  // COMPONENTS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_H_