Adding a TouchFile() operation.

webkit/fileapi/file_system_operation.h

Index: webkit/fileapi/file_system_operation.h
===================================================================
--- webkit/fileapi/file_system_operation.h	(revision 60236)
+++ webkit/fileapi/file_system_operation.h	(working copy)
@@ -15,6 +15,10 @@
 #include "base/scoped_callback_factory.h"
 #include "base/scoped_ptr.h"
 
+namespace base {
+class Time;
+}
+
 namespace fileapi {
 
 class FileSystemCallbackDispatcher;
@@ -55,6 +59,10 @@
 
   void Remove(const FilePath& path);
 
+  void TouchFile(const FilePath& path,
+                 const base::Time& last_access_time,
+                 const base::Time& last_modified_time);
+
  protected:
   // Proxy for calling file_util_proxy methods.
   scoped_refptr<base::MessageLoopProxy> proxy_;
@@ -84,6 +92,8 @@
       base::PlatformFileError rv,
       const std::vector<base::file_util_proxy::Entry>& entries);
 
+  void DidTouchFile(base::PlatformFileError rv);
+
   scoped_ptr<FileSystemCallbackDispatcher> dispatcher_;
 
   base::ScopedCallbackFactory<FileSystemOperation> callback_factory_;