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.h"
 #include "base/path_service.h"
@@ skipping 190 matching lines @@
   mount_points_->AddMountPointInfosTo(&mount_points);
   system_mount_points_->AddMountPointInfosTo(&mount_points);
 
   std::vector<base::FilePath> root_dirs;
   for (size_t i = 0; i < mount_points.size(); ++i)
     root_dirs.push_back(mount_points[i].path);
   return root_dirs;
 }
 
 fileapi::FileSystemFileUtil* FileSystemBackend::GetFileUtil(
-    fileapi::FileSystemType type) {
+    fileapi::FileSystemType type,
+    const fileapi::FileSystemContext* context) {
   DCHECK(type == fileapi::kFileSystemTypeNativeLocal ||
          type == fileapi::kFileSystemTypeRestrictedNativeLocal);
   return local_file_util_->sync_file_util();
 }
 
 fileapi::AsyncFileUtil* FileSystemBackend::GetAsyncFileUtil(
-    fileapi::FileSystemType type) {
+    fileapi::FileSystemType type,
+    const fileapi::FileSystemContext* context) {
   if (type == fileapi::kFileSystemTypeDrive)
     return drive_delegate_->GetAsyncFileUtil(type);
 
   DCHECK(type == fileapi::kFileSystemTypeNativeLocal ||
          type == fileapi::kFileSystemTypeRestrictedNativeLocal);
   return local_file_util_.get();
 }
 
 fileapi::CopyOrMoveFileValidatorFactory*
 FileSystemBackend::GetCopyOrMoveFileValidatorFactory(
@@ skipping 86 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