[ew] Add basic classes.

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/strings/stringprintf.h"
 #include "chrome/browser/chromeos/fileapi/file_access_permissions.h"
@@ skipping 231 matching lines @@
     case storage::kFileSystemTypeRestrictedNativeLocal:
       return local_file_util_.get();
     case storage::kFileSystemTypeDeviceMediaAsFileStorage:
       return mtp_delegate_->GetAsyncFileUtil(type);
     default:
       NOTREACHED();
   }
   return NULL;
 }
 
+storage::WatcherManager* FileSystemBackend::GetWatcherManager(
+    storage::FileSystemType type) {
+  return NULL;
+}
+
 storage::CopyOrMoveFileValidatorFactory*
 FileSystemBackend::GetCopyOrMoveFileValidatorFactory(
     storage::FileSystemType type,
     base::File::Error* error_code) {
   DCHECK(error_code);
   *error_code = base::File::FILE_OK;
   return NULL;
 }
 
 storage::FileSystemOperation* FileSystemBackend::CreateFileSystemOperation(
@@ skipping 114 matching lines @@
 }
 
 bool FileSystemBackend::GetVirtualPath(
     const base::FilePath& filesystem_path,
     base::FilePath* virtual_path) {
   return mount_points_->GetVirtualPath(filesystem_path, virtual_path) ||
          system_mount_points_->GetVirtualPath(filesystem_path, virtual_path);
 }
 
 }  // namespace chromeos