SyncFS: Introduce SyncFileSystemBackend

chrome/browser/chromeos/fileapi/file_system_backend.cc

 // 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.
 
 #include "chrome/browser/chromeos/fileapi/file_system_backend.h"
 
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
@@ skipping 88 matching lines @@
     case fileapi::kFileSystemTypeDrive:
     case fileapi::kFileSystemTypeRestrictedNativeLocal:
     case fileapi::kFileSystemTypeNativeLocal:
     case fileapi::kFileSystemTypeNativeForPlatformApp:
       return true;
     default:
       return false;
   }
 }
 
+void FileSystemBackend::Initialize(const fileapi::FileSystemContext* context) {
+}
+
 void FileSystemBackend::InitializeFileSystem(
     const GURL& origin_url,
     fileapi::FileSystemType type,
     fileapi::OpenFileSystemMode mode,
     fileapi::FileSystemContext* context,
     const InitializeFileSystemCallback& callback) {
   DCHECK(fileapi::IsolatedContext::IsIsolatedType(type));
   // Nothing to validate for external filesystem.
   callback.Run(GetFileSystemRootURI(origin_url, type),
                GetFileSystemName(origin_url, type),
@@ skipping 194 matching lines @@
   std::string mount_name = url.filesystem_id();
   if (!mount_points_->GetRegisteredPath(mount_name, &root_path) &&
       !system_mount_points_->GetRegisteredPath(mount_name, &root_path)) {
     return base::FilePath();
   }
 
   return root_path.DirName();
 }
 
 }  // namespace chromeos