Revert 148792 - [Sync] Remove CleanupDisabledTypes command and move purge logic into SyncManager.

sync/internal_api/sync_manager_impl.h

 // Copyright (c) 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_INTERNAL_API_SYNC_MANAGER_H_
 #define SYNC_INTERNAL_API_SYNC_MANAGER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 162 matching lines @@
   // Called only by our NetworkChangeNotifier.
   virtual void OnIPAddressChanged() OVERRIDE;
 
   const SyncScheduler* scheduler() const;
 
  private:
   friend class SyncManagerTest;
   FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, NudgeDelayTest);
   FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, OnNotificationStateChange);
   FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, OnIncomingNotification);
-  FRIEND_TEST_ALL_PREFIXES(SyncManagerTest, PurgeDisabledTypes);
 
   struct NotificationInfo {
     NotificationInfo();
     ~NotificationInfo();
 
     int total_count;
     std::string payload;
 
     // Returned pointer owned by the caller.
     DictionaryValue* ToValue() const;
@@ skipping 27 matching lines @@
 
   // Open the directory named with username_for_share
   bool OpenDirectory();
 
   // Sign into sync with given credentials.
   // We do not verify the tokens given. After this call, the tokens are set
   // and the sync DB is open. True if successful, false if something
   // went wrong.
   bool SignIn(const SyncCredentials& credentials);
 
-  // Purge those types from |previously_enabled_types| that are no longer
-  // enabled in |currently_enabled_types|.
-  bool PurgeDisabledTypes(ModelTypeSet previously_enabled_types,
-                          ModelTypeSet currently_enabled_types);
-
   void RequestNudgeForDataTypes(
       const tracked_objects::Location& nudge_location,
       ModelTypeSet type);
 
   void NotifyCryptographerState(Cryptographer* cryptographer);
 
   // If this is a deletion for a password, sets the legacy
   // ExtraPasswordChangeRecordData field of |buffer|. Otherwise sets
   // |buffer|'s specifics field to contain the unencrypted data.
   void SetExtraChangeRecordData(int64 id,
@@ skipping 161 matching lines @@
   // conflict resolver) updated the nigori's encryption keys in this chrome
   // instantiation.
   int nigori_overwrite_count_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncManagerImpl);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_SYNC_MANAGER_H_