[sync] Clean up path generation for the local sync database.

components/sync/driver/sync_client.h

 // Copyright 2015 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_SYNC_CLIENT_H_
 #define COMPONENTS_SYNC_DRIVER_SYNC_CLIENT_H_
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ skipping 49 matching lines @@
 
   // Initializes the sync client with the specified sync service.
   virtual void Initialize() = 0;
 
   // Returns the current SyncService instance.
   virtual SyncService* GetSyncService() = 0;
 
   // Returns the current profile's preference service.
   virtual PrefService* GetPrefService() = 0;
 
+  // Returns the path to the folder used for storing the local sync database.
+  // It is only used when sync is running against a local backend.
+  virtual base::FilePath GetLocalSyncBackendFolder() = 0;
+
   // DataType specific service getters.
   virtual bookmarks::BookmarkModel* GetBookmarkModel() = 0;
   virtual favicon::FaviconService* GetFaviconService() = 0;
   virtual history::HistoryService* GetHistoryService() = 0;
   virtual bool HasPasswordStore() = 0;
 
   // Returns a callback that will register the types specific to the current
   // platform.
   virtual SyncApiComponentFactory::RegisterDataTypesMethod
   GetRegisterPlatformTypesCallback() = 0;
@@ skipping 29 matching lines @@
   // Returns the current SyncApiComponentFactory instance.
   virtual SyncApiComponentFactory* GetSyncApiComponentFactory() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(SyncClient);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_DRIVER_SYNC_CLIENT_H_