arc: Empty implementation of ARC content file system

chrome/browser/chromeos/arc/fileapi/arc_content_file_system_backend_delegate.h

-// Copyright 2014 The Chromium Authors. All rights reserved.
+// Copyright 2016 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_
-
-#include <stdint.h>
+#ifndef CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_CONTENT_FILE_SYSTEM_BACKEND_DELEGATE_H_
+#define CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_CONTENT_FILE_SYSTEM_BACKEND_DELEGATE_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "chrome/browser/chromeos/fileapi/file_system_backend_delegate.h"
 
-namespace storage {
-class AsyncFileUtil;
-class FileSystemContext;
-class FileStreamReader;
-class FileSystemURL;
-class FileStreamWriter;
-class WatcherManager;
-}  // namespace storage
-
-namespace drive {
+namespace arc {
 
 // Delegate implementation of the some methods in chromeos::FileSystemBackend
-// for Drive file system.
-class FileSystemBackendDelegate : public chromeos::FileSystemBackendDelegate {
+// for ARC content file system.
+class ArcContentFileSystemBackendDelegate
+    : public chromeos::FileSystemBackendDelegate {
  public:
-  FileSystemBackendDelegate();
-  ~FileSystemBackendDelegate() override;
+  ArcContentFileSystemBackendDelegate();
+  ~ArcContentFileSystemBackendDelegate() override;
 
   // FileSystemBackend::Delegate overrides.
   storage::AsyncFileUtil* GetAsyncFileUtil(
       storage::FileSystemType type) override;
   std::unique_ptr<storage::FileStreamReader> CreateFileStreamReader(
       const storage::FileSystemURL& url,
       int64_t offset,
       int64_t max_bytes_to_read,
       const base::Time& expected_modification_time,
       storage::FileSystemContext* context) override;
   std::unique_ptr<storage::FileStreamWriter> CreateFileStreamWriter(
       const storage::FileSystemURL& url,
       int64_t offset,
       storage::FileSystemContext* context) override;
   storage::WatcherManager* GetWatcherManager(
       storage::FileSystemType type) override;
   void GetRedirectURLForContents(const storage::FileSystemURL& url,
                                  const storage::URLCallback& callback) override;
 
  private:
   std::unique_ptr<storage::AsyncFileUtil> async_file_util_;
 
-  DISALLOW_COPY_AND_ASSIGN(FileSystemBackendDelegate);
+  DISALLOW_COPY_AND_ASSIGN(ArcContentFileSystemBackendDelegate);
 };
 
-}  // namespace drive
+}  // namespace arc
 
-#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_FILEAPI_FILE_SYSTEM_BACKEND_DELEGATE_H_
+#endif  // CHROME_BROWSER_CHROMEOS_ARC_FILEAPI_ARC_CONTENT_FILE_SYSTEM_BACKEND_DELEGATE_H_