[Sync] Stop deleting LevelDB files when deleting Directory

components/sync/driver/glue/sync_backend_host_core.h

 // 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.
 
 #ifndef COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_
 #define COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_
 
 #include <stdint.h>
 
 #include <map>
@@ skipping 21 matching lines @@
 class SyncBackendHostImpl;
 
 class SyncBackendHostCore
     : public base::RefCountedThreadSafe<SyncBackendHostCore>,
       public base::trace_event::MemoryDumpProvider,
       public SyncEncryptionHandler::Observer,
       public SyncManager::Observer,
       public TypeDebugInfoObserver {
  public:
   SyncBackendHostCore(const std::string& name,
-                      const base::FilePath& sync_data_folder_path,
+                      const base::FilePath& sync_data_folder,
                       const base::WeakPtr<SyncBackendHostImpl>& backend);
 
   // MemoryDumpProvider implementation.
   bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args,
                     base::trace_event::ProcessMemoryDump* pmd) override;
 
   // SyncManager::Observer implementation.  The Core just acts like an air
   // traffic controller here, forwarding incoming messages to appropriate
   // landing threads.
   void OnSyncCycleCompleted(const SyncCycleSnapshot& snapshot) override;
@@ skipping 113 matching lines @@
   void DisableProtocolEventForwarding();
 
   // Enables the forwarding of directory type debug counters to the
   // SyncEngineHost. Also requests that updates to all counters be emitted right
   // away to initialize any new listeners' states.
   void EnableDirectoryTypeDebugInfoForwarding();
 
   // Disables forwarding of directory type debug counters.
   void DisableDirectoryTypeDebugInfoForwarding();
 
-  // Delete the sync data folder to cleanup backend data.  Happens the first
-  // time sync is enabled for a user (to prevent accidentally reusing old
-  // sync databases), as well as shutdown when you're no longer syncing.
-  void DeleteSyncDataFolder();
-
   // Tell the sync manager to persist its state by writing to disk.
   // Called on the sync thread, both by a timer and, on Android, when the
   // application is backgrounded.
   void SaveChanges();
 
   void DoClearServerData(
       const SyncManager::ClearServerDataCallback& frontend_callback);
 
   // Notify the syncer that the cookie jar has changed.
   void DoOnCookieJarChanged(bool account_mismatch, bool empty_jar);
 
  private:
   friend class base::RefCountedThreadSafe<SyncBackendHostCore>;
 
   ~SyncBackendHostCore() override;
 
   // Invoked when initialization of syncapi is complete and we can start
   // our timer.
   // This must be called from the thread on which SaveChanges is intended to
   // be run on; the host's |registrar_->sync_thread()|.
   void StartSavingChanges();
 
   void ClearServerDataDone(const base::Closure& frontend_callback);
 
   // Name used for debugging.
   const std::string name_;
 
   // Path of the folder that stores the sync data files.
-  const base::FilePath sync_data_folder_path_;
+  const base::FilePath sync_data_folder_;
 
   // Our parent SyncBackendHostImpl.
   WeakHandle<SyncBackendHostImpl> host_;
 
   // Non-null only between calls to DoInitialize() and DoShutdown().
   std::unique_ptr<SyncBackendRegistrar> registrar_;
 
   // The timer used to periodically call SaveChanges.
   std::unique_ptr<base::RepeatingTimer> save_changes_timer_;
 
@@ skipping 33 matching lines @@
   base::ThreadChecker thread_checker_;
 
   base::WeakPtrFactory<SyncBackendHostCore> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncBackendHostCore);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_GLUE_SYNC_BACKEND_HOST_CORE_H_