Channel all low lever scheduling calls through single function

sync/engine/sync_scheduler_impl.h

 // Copyright 2012 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 SYNC_ENGINE_SYNC_SCHEDULER_IMPL_H_
 #define SYNC_ENGINE_SYNC_SCHEDULER_IMPL_H_
 
 #include <map>
 #include <string>
 
@@ skipping 149 matching lines @@
   // Invoke the syncer to perform a configuration job.
   void DoConfigurationSyncSessionJob(JobPriority priority);
 
   // Helper function for Do{Nudge,Configuration}SyncSessionJob.
   void HandleFailure(
       const sessions::ModelNeutralState& model_neutral_state);
 
   // Invoke the Syncer to perform a poll job.
   void DoPollSyncSessionJob();
 
+  // Helper function to calculate poll interval.
+  base::TimeDelta GetPollInterval();
+
   // Adjusts the poll timer to account for new poll interval, and possibly
   // resets the poll interval, depedning on the flag's value.
   void AdjustPolling(PollAdjustType type);
 
   // Helper to restart waiting with |wait_interval_|'s timer.
   void RestartWaiting();
 
   // Determines if we're allowed to contact the server right now.
   bool CanRunJobNow(JobPriority priority);
 
@@ skipping 17 matching lines @@
   // Helper to signal listeners about changed retry time.
   void NotifyRetryTime(base::Time retry_time);
 
   // Helper to signal listeners about changed throttled types.
   void NotifyThrottledTypesChanged(ModelTypeSet types);
 
   // Looks for pending work and, if it finds any, run this work at "canary"
   // priority.
   void TryCanaryJob();
 
+  void TrySyncSessionJob(JobPriority priority);
+
   // Transitions out of the THROTTLED WaitInterval then calls TryCanaryJob().
   void Unthrottle();
 
   // Called when a per-type throttling interval expires.
   void TypeUnthrottle(base::TimeTicks unthrottle_time);
 
   // Runs a normal nudge job when the scheduled timer expires.
   void PerformDelayedNudge();
 
   // Attempts to exit EXPONENTIAL_BACKOFF by calling TryCanaryJob().
@@ skipping 85 matching lines @@
 
   // crbug/251307. This is a workaround for M29. crbug/259913 tracks proper fix
   // for M30.
   // The issue is that poll job runs after few hours of inactivity and therefore
   // will always fail with auth error because of expired access token. Once
   // fresh access token is requested poll job is not retried.
   // The change is to remember that poll timer just fired and retry poll job
   // after credentials are updated.
   bool do_poll_after_credentials_updated_;
 
+  // TryJob might get called for multiple reasons. It should only call
+  // DoPollSyncSessionJob after some time since the last attempt.
+  // last_poll_reset_ keeps track of when was last attempt.
+  base::TimeTicks last_poll_reset_;
+
   base::WeakPtrFactory<SyncSchedulerImpl> weak_ptr_factory_;
 
   // A second factory specially for weak_handle_this_, to allow the handle
   // to be const and alleviate threading concerns.
   base::WeakPtrFactory<SyncSchedulerImpl> weak_ptr_factory_for_weak_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncSchedulerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_ENGINE_SYNC_SCHEDULER_IMPL_H_