Expose a method in VariationsService to trigger a seed fetch.

chrome/browser/metrics/variations/variations_request_scheduler_mobile.h

 // 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 CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_
 #define CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_
 
 #include "base/bind.h"
 #include "chrome/browser/metrics/variations/variations_request_scheduler.h"
 
 class PrefService;
 
 namespace chrome_variations {
 
 // A specialized VariationsRequestScheduler that manages request cycles for
 // VariationsService on mobile platforms.
 class VariationsRequestSchedulerMobile : public VariationsRequestScheduler {
  public:
   // |task} is the closure to call when the scheduler deems ready. |local_state|
   // is the PrefService that contains the time of the last fetch.
   explicit VariationsRequestSchedulerMobile(const base::Closure& task,
                                             PrefService* local_state);
   virtual ~VariationsRequestSchedulerMobile();
 
   // Base class overrides.
   virtual void Start() OVERRIDE;
   virtual void Reset() OVERRIDE;
+  virtual void OnAppEnterForeground() OVERRIDE;
 
  private:
+  FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
+                           OnAppEnterForegroundNoRun);
+  FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
+                           OnAppEnterForegroundRun);
+  FRIEND_TEST_ALL_PREFIXES(VariationsRequestSchedulerMobileTest,
+                           OnAppEnterForegroundOnStartup);
+
+

[Alexei Svitkine (slow), 2014/02/14 19:11:51]

Nit: Remove extra blank lines.

[rkaplow, 2014/02/14 19:18:04]

Done.

+
   // The local state instance that provides the last fetch time.
   PrefService* local_state_;
 
+  // Timer used for triggering a delayed fetch for ScheduleFetch().
+  base::OneShotTimer<VariationsRequestSchedulerMobile> schedule_fetch_timer_;
+
+  // The time the last seed request was initiated.
+  base::Time last_request_time_;
+
   DISALLOW_COPY_AND_ASSIGN(VariationsRequestSchedulerMobile);
 };
 
 }  // namespace chrome_variations
 
 #endif  // CHROME_BROWSER_METRICS_VARIATIONS_VARIATIONS_REQUEST_SCHEDULER_MOBILE_H_