arc: Empty implementation of ARC content file system

chrome/browser/chromeos/arc/fileapi/arc_content_file_system_file_stream_reader.cc

+// 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.
+
+#include "chrome/browser/chromeos/arc/fileapi/arc_content_file_system_file_stream_reader.h"
+
+#include "net/base/net_errors.h"
+
+namespace arc {
+
+ArcContentFileSystemFileStreamReader::ArcContentFileSystemFileStreamReader(
+    const storage::FileSystemURL& url,
+    int64_t offset,
+    int64_t max_bytes_to_read) {}
+
+ArcContentFileSystemFileStreamReader::~ArcContentFileSystemFileStreamReader() {}
+
+int ArcContentFileSystemFileStreamReader::Read(
+    net::IOBuffer* buffer,
+    int buffer_length,
+    const net::CompletionCallback& callback) {
+  NOTIMPLEMENTED();
+  return net::ERR_FAILED;

[hidehiko, 2016/10/12 09:59:07]

maybe net::ERR_NOT_IMPLEMENTED?

[hashimoto, 2016/10/12 10:08:11]

Done.

+}
+
+int64_t ArcContentFileSystemFileStreamReader::GetLength(
+    const net::Int64CompletionCallback& callback) {
+  NOTIMPLEMENTED();
+  return net::ERR_FAILED;
+}
+
+}  // namespace arc