Adding a TouchFile() operation.

chrome/common/file_system/file_system_dispatcher.cc

 // Copyright (c) 2010 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/common/file_system/file_system_dispatcher.h"
 
 #include "base/file_util.h"
 #include "chrome/common/child_thread.h"
 #include "chrome/common/render_messages.h"
 #include "chrome/common/render_messages_params.h"
@@ skipping 81 matching lines @@
 }
 
 bool FileSystemDispatcher::ReadDirectory(
     const FilePath& path,
     fileapi::FileSystemCallbackDispatcher* dispatcher) {
   int request_id = dispatchers_.Add(dispatcher);
   return ChildThread::current()->Send(
       new ViewHostMsg_FileSystem_ReadDirectory(request_id, path));
 }
 
+bool FileSystemDispatcher::TouchFile(
+    const FilePath& path,
+    const base::Time& last_access_time,
+    const base::Time& last_modified_time,
+    fileapi::FileSystemCallbackDispatcher* dispatcher) {
+  int request_id = dispatchers_.Add(dispatcher);
+  return ChildThread::current()->Send(
+      new ViewHostMsg_FileSystem_TouchFile(
+          request_id, path, last_access_time, last_modified_time));
+}
+
 void FileSystemDispatcher::DidSucceed(int request_id) {
   fileapi::FileSystemCallbackDispatcher* dispatcher =
       dispatchers_.Lookup(request_id);
   DCHECK(dispatcher);
   dispatcher->DidSucceed();
   dispatchers_.Remove(request_id);
 }
 
 void FileSystemDispatcher::DidReadMetadata(
     int request_id, const base::PlatformFileInfo& file_info) {
@@ skipping 16 matching lines @@
 }
 
 void FileSystemDispatcher::DidFail(
     int request_id, base::PlatformFileError error_code) {
   fileapi::FileSystemCallbackDispatcher* dispatcher =
       dispatchers_.Lookup(request_id);
   DCHECK(dispatcher);
   dispatcher->DidFail(error_code);
   dispatchers_.Remove(request_id);
 }