Adding a TouchFile() operation.

chrome/browser/file_system/file_system_dispatcher_host.h

Index: chrome/browser/file_system/file_system_dispatcher_host.h
===================================================================
--- chrome/browser/file_system/file_system_dispatcher_host.h	(revision 60236)
+++ chrome/browser/file_system/file_system_dispatcher_host.h	(working copy)
@@ -16,6 +16,10 @@
 #include "chrome/common/render_messages.h"
 #include "webkit/fileapi/file_system_operation.h"
 
+namespace base {
+class Time;
+}
+
 class FileSystemHostContext;
 class HostContentSettingsMap;
 class Receiver;
@@ -49,6 +53,10 @@
                 bool recursive);
   void OnExists(int request_id, const FilePath& path, bool is_directory);
   void OnReadDirectory(int request_id, const FilePath& path);
+  void OnTouchFile(int request_id,
+                   const FilePath& path,
+                   const base::Time& last_access_time,
+                   const base::Time& last_modified_time);
   void Send(IPC::Message* message);
   void RemoveCompletedOperation(int request_id);