SyncFS: Introduce SyncFileSystemBackend

chrome/browser/chromeos/fileapi/file_system_backend.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 CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_H_
 #define CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 72 matching lines @@
   // function is no-op if these mount points are already present.
   void AddSystemMountPoints();
 
   // Returns true if CrosMountpointProvider can handle |url|, i.e. its
   // file system type matches with what this provider supports.
   // This could be called on any threads.
   static bool CanHandleURL(const fileapi::FileSystemURL& url);
 
   // fileapi::FileSystemBackend overrides.
   virtual bool CanHandleType(fileapi::FileSystemType type) const OVERRIDE;
+  virtual void Initialize(const fileapi::FileSystemContext* context) OVERRIDE;
   virtual void InitializeFileSystem(
       const GURL& origin_url,
       fileapi::FileSystemType type,
       fileapi::OpenFileSystemMode mode,
       fileapi::FileSystemContext* context,
       const InitializeFileSystemCallback& callback) OVERRIDE;
   virtual fileapi::FileSystemFileUtil* GetFileUtil(
       fileapi::FileSystemType type) OVERRIDE;
   virtual fileapi::AsyncFileUtil* GetAsyncFileUtil(
       fileapi::FileSystemType type) OVERRIDE;
@@ skipping 56 matching lines @@
   // Globally visible mount points. System MountPonts instance should outlive
   // all FileSystemBackend instances, so raw pointer is safe.
   fileapi::ExternalMountPoints* system_mount_points_;
 
   DISALLOW_COPY_AND_ASSIGN(FileSystemBackend);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILEAPI_FILE_SYSTEM_BACKEND_H_