[Sync] Move //sync to //components/sync.

sync/sessions/nudge_tracker.h

Index: sync/sessions/nudge_tracker.h
diff --git a/sync/sessions/nudge_tracker.h b/sync/sessions/nudge_tracker.h
deleted file mode 100644
index 2a0581e28172d3f7f02fdffed7bc45ab04794847..0000000000000000000000000000000000000000
--- a/sync/sessions/nudge_tracker.h
+++ /dev/null
@@ -1,212 +0,0 @@
-// Copyright 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.
-//
-// A class to track the outstanding work required to bring the client back into
-// sync with the server.
-#ifndef SYNC_SESSIONS_NUDGE_TRACKER_H_
-#define SYNC_SESSIONS_NUDGE_TRACKER_H_
-
-#include <stddef.h>
-
-#include <list>
-#include <map>
-#include <memory>
-
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "base/time/time.h"
-#include "sync/base/sync_export.h"
-#include "sync/internal_api/public/base/invalidation_interface.h"
-#include "sync/internal_api/public/base/model_type.h"
-#include "sync/protocol/sync.pb.h"
-#include "sync/sessions/data_type_tracker.h"
-
-namespace syncer {
-
-class ObjectIdInvalidationMap;
-
-namespace sessions {
-
-class SYNC_EXPORT NudgeTracker {
- public:
-  static size_t kDefaultMaxPayloadsPerType;
-
-  NudgeTracker();
-  ~NudgeTracker();
-
-  // Returns true if there is a good reason for performing a sync cycle.
-  // This does not take into account whether or not this is a good *time* to
-  // perform a sync cycle; that's the scheduler's job.
-  bool IsSyncRequired() const;
-
-  // Returns true if there is a good reason for performing a get updates
-  // request as part of the next sync cycle.
-  bool IsGetUpdatesRequired() const;
-
-  // Return true if should perform a sync cycle for GU retry.
-  //
-  // This is sensitive to changes in 'current time'.  Its value can be affected
-  // by SetSyncCycleStartTime(), SetNextRetryTime(), and
-  // RecordSuccessfulSyncCycle().  Please refer to those functions for more
-  // information on how this flag is maintained.
-  bool IsRetryRequired() const;
-
-  // Tells this class that all required update fetching or committing has
-  // completed successfully.
-  void RecordSuccessfulSyncCycle();
-
-  // Takes note of a local change.
-  // Returns the shortest nudge delay from the tracker of each type in |types|.
-  base::TimeDelta RecordLocalChange(ModelTypeSet types);
-
-  // Takes note of a locally issued request to refresh a data type.
-  // Returns the current nudge delay for a local refresh.
-  base::TimeDelta RecordLocalRefreshRequest(ModelTypeSet types);
-
-  // Takes note of the receipt of an invalidation notice from the server.
-  // Returns the current nudge delay for a remote invalidation.
-  base::TimeDelta RecordRemoteInvalidation(
-      syncer::ModelType type,
-      std::unique_ptr<InvalidationInterface> invalidation);
-
-  // Take note that an initial sync is pending for this type.
-  void RecordInitialSyncRequired(syncer::ModelType type);
-
-  // Takes note that the conflict happended for this type, need to sync to
-  // resolve conflict locally.
-  void RecordCommitConflict(syncer::ModelType type);
-
-  // These functions should be called to keep this class informed of the status
-  // of the connection to the invalidations server.
-  void OnInvalidationsEnabled();
-  void OnInvalidationsDisabled();
-
-  // Marks |types| as being throttled from |now| until |now| + |length|.
-  void SetTypesThrottledUntil(ModelTypeSet types,
-                              base::TimeDelta length,
-                              base::TimeTicks now);
-
-  // Removes any throttling that have expired by time |now|.
-  void UpdateTypeThrottlingState(base::TimeTicks now);
-
-  // Returns the time of the next type unthrottling, relative to
-  // the input |now| value.
-  base::TimeDelta GetTimeUntilNextUnthrottle(base::TimeTicks now) const;
-
-  // Returns true if any type is currenlty throttled.
-  bool IsAnyTypeThrottled() const;
-
-  // Returns true if |type| is currently throttled.
-  bool IsTypeThrottled(ModelType type) const;
-
-  // Returns the set of currently throttled types.
-  ModelTypeSet GetThrottledTypes() const;
-
-  // Returns the set of types with local changes pending.
-  ModelTypeSet GetNudgedTypes() const;
-
-  // Returns the set of types that have pending invalidations.
-  ModelTypeSet GetNotifiedTypes() const;
-
-  // Returns the set of types that have pending refresh requests.
-  ModelTypeSet GetRefreshRequestedTypes() const;
-
-  // Returns the 'source' of the GetUpdate request.
-  //
-  // This flag is deprecated, but still used by the server.  There can be more
-  // than one reason to perform a particular sync cycle.  The GetUpdatesTrigger
-  // message will contain more reliable information about the reasons for
-  // performing a sync.
-  //
-  // See the implementation for important information about the coalesce logic.
-  sync_pb::GetUpdatesCallerInfo::GetUpdatesSource GetLegacySource() const;
-
-  // Fills a GetUpdatesTrigger message for the next GetUpdates request.  This is
-  // used by the DownloadUpdatesCommand to dump lots of useful per-type state
-  // information into the GetUpdate request before sending it off to the server.
-  void FillProtoMessage(
-      ModelType type,
-      sync_pb::GetUpdateTriggers* msg) const;
-
-  // Fills a ProgressMarker with single legacy notification hint expected by the
-  // sync server.  Newer servers will rely on the data set by FillProtoMessage()
-  // instead of this.
-  void SetLegacyNotificationHint(
-      ModelType type,
-      sync_pb::DataTypeProgressMarker* progress) const;
-
-  // Flips the flag if we're due for a retry.
-  void SetSyncCycleStartTime(base::TimeTicks now);
-
-  // Adjusts the number of hints that can be stored locally.
-  void SetHintBufferSize(size_t size);
-
-  // Schedules a retry GetUpdate request for some time in the future.
-  //
-  // This is a request sent to us as part of a server response requesting
-  // that the client perform a GetUpdate request at |next_retry_time| to
-  // fetch any updates it may have missed in the first attempt.
-  //
-  // To avoid strange results from IsRetryRequired() during a sync cycle, the
-  // effects of this change are not guaranteed to take effect until
-  // SetSyncCycleStartTime() is called at the start of the *next* sync cycle.
-  void SetNextRetryTime(base::TimeTicks next_retry_time);
-
-  // Update the per-datatype local change nudge delays.
-  void OnReceivedCustomNudgeDelays(
-      const std::map<ModelType, base::TimeDelta>& delay_map);
-
-  // Update the default nudge delay.
-  void SetDefaultNudgeDelay(base::TimeDelta nudge_delay);
-
- private:
-  using TypeTrackerMap = std::map<ModelType, std::unique_ptr<DataTypeTracker>>;
-
-  TypeTrackerMap type_trackers_;
-
-  // Tracks whether or not invalidations are currently enabled.
-  bool invalidations_enabled_;
-
-  // This flag is set if suspect that some technical malfunction or known bug
-  // may have left us with some unserviced invalidations.
-  //
-  // Keeps track of whether or not we're fully in sync with the invalidation
-  // server.  This can be false even if invalidations are enabled and working
-  // correctly.  For example, until we get ack-tracking working properly, we
-  // won't persist invalidations between restarts, so we may be out of sync when
-  // we restart.  The only way to get back into sync is to have invalidations
-  // enabled, then complete a sync cycle to make sure we're fully up to date.
-  bool invalidations_out_of_sync_;
-
-  base::TimeTicks last_successful_sync_time_;
-
-  // A pending update to the current_retry_time_.
-  //
-  // The GU retry time is specified by a call to SetNextRetryTime, but we don't
-  // want that change to take effect right away, since it could happen in the
-  // middle of a sync cycle.  We delay the update until the start of the next
-  // sync cycle, which is indicated by a call to SetSyncCycleStartTime().
-  base::TimeTicks next_retry_time_;
-
-  // The currently active retry GU time.  Will be null if there is no retry GU
-  // pending at this time.
-  base::TimeTicks current_retry_time_;
-
-  // The time when the sync cycle started.  This value is maintained by
-  // SetSyncCycleStartTime().  This may contain a stale value if we're not
-  // currently in a sync cycle.
-  base::TimeTicks sync_cycle_start_time_;
-
-  // Nudge delays for various events.
-  base::TimeDelta minimum_local_nudge_delay_;
-  base::TimeDelta local_refresh_nudge_delay_;
-  base::TimeDelta remote_invalidation_nudge_delay_;
-
-  DISALLOW_COPY_AND_ASSIGN(NudgeTracker);
-};
-
-}  // namespace sessions
-}  // namespace syncer
-
-#endif  // SYNC_SESSIONS_NUDGE_TRACKER_H_