[fsp] Add an initial AsyncFileUtil.

chrome/browser/chromeos/file_system_provider/fileapi/backend_delegate.h

 // Copyright 2014 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_DRIVE_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
-#define CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
+#ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_BACKEND_DELEGATE_H_
+#define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_BACKEND_DELEGATE_H_
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/chromeos/fileapi/file_system_backend_delegate.h"
 
 namespace fileapi {
 class AsyncFileUtil;
 }  // namespace fileapi
 
-namespace drive {
+namespace chromeos {
+namespace file_system_provider {
 
 // Delegate implementation of the some methods in chromeos::FileSystemBackend
-// for Drive file system.
-class FileSystemBackendDelegate : public chromeos::FileSystemBackendDelegate {
+// for provided file systems.
+class BackendDelegate : public chromeos::FileSystemBackendDelegate {
  public:
-  FileSystemBackendDelegate();
-  virtual ~FileSystemBackendDelegate();
+  BackendDelegate();
+  virtual ~BackendDelegate();
 
   // FileSystemBackend::Delegate overrides.
-  virtual fileapi::AsyncFileUtil* GetAsyncFileUtil(
-      fileapi::FileSystemType type) OVERRIDE;
+  virtual fileapi::AsyncFileUtil* GetAsyncFileUtil(fileapi::FileSystemType type)
+      OVERRIDE;
   virtual scoped_ptr<webkit_blob::FileStreamReader> CreateFileStreamReader(
       const fileapi::FileSystemURL& url,
       int64 offset,
       const base::Time& expected_modification_time,
       fileapi::FileSystemContext* context) OVERRIDE;
   virtual scoped_ptr<fileapi::FileStreamWriter> CreateFileStreamWriter(
       const fileapi::FileSystemURL& url,
       int64 offset,
       fileapi::FileSystemContext* context) OVERRIDE;
 
  private:
   scoped_ptr<fileapi::AsyncFileUtil> async_file_util_;
 
-  DISALLOW_COPY_AND_ASSIGN(FileSystemBackendDelegate);
+  DISALLOW_COPY_AND_ASSIGN(BackendDelegate);
 };
 
-}  // namespace drive
+}  // namespace file_system_provider
+}  // namespace chromeos
 
-#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
+#endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_BACKEND_DELEGATE_H_