[ew] Add basic classes.

webkit/browser/fileapi/sandbox_file_system_backend.cc

 // Copyright (c) 2012 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 "webkit/browser/fileapi/sandbox_file_system_backend.h"
 
 #include "base/bind.h"
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
@@ skipping 69 matching lines @@
                             callback,
                             GetFileSystemRootURI(url.origin(), url.type()));
 }
 
 AsyncFileUtil* SandboxFileSystemBackend::GetAsyncFileUtil(
     FileSystemType type) {
   DCHECK(delegate_);
   return delegate_->file_util();
 }
 
+WatcherManager* SandboxFileSystemBackend::GetWatcherManager(
+    FileSystemType type) {
+  return NULL;
+}
+
 CopyOrMoveFileValidatorFactory*
 SandboxFileSystemBackend::GetCopyOrMoveFileValidatorFactory(
     FileSystemType type,
     base::File::Error* error_code) {
   DCHECK(error_code);
   *error_code = base::File::FILE_OK;
   return NULL;
 }
 
 FileSystemOperation* SandboxFileSystemBackend::CreateFileSystemOperation(
@@ skipping 49 matching lines @@
   return delegate_;
 }
 
 SandboxFileSystemBackendDelegate::OriginEnumerator*
 SandboxFileSystemBackend::CreateOriginEnumerator() {
   DCHECK(delegate_);
   return delegate_->CreateOriginEnumerator();
 }
 
 }  // namespace fileapi