Revert 108639 - again it seems to have broken Mac layout tests

base/file_util_proxy.h

Index: base/file_util_proxy.h
===================================================================
--- base/file_util_proxy.h	(revision 108640)
+++ base/file_util_proxy.h	(working copy)
@@ -32,7 +32,7 @@
   };
 
   // This callback is used by methods that report only an error code.  It is
-  // valid to pass a null callback to any function that takes a StatusCallback,
+  // valid to pass StatusCallback() to any function that takes a StatusCallback,
   // in which case the operation will complete silently.
   typedef Callback<void(PlatformFileError)> StatusCallback;
 
@@ -51,9 +51,6 @@
   typedef Callback<void(PlatformFileError,
                         int /* bytes written */)> WriteCallback;
 
-  typedef Callback<PlatformFileError(PlatformFile*, bool*)> CreateOrOpenTask;
-  typedef Callback<PlatformFileError(PlatformFile)> CloseTask;
-
   // Creates or opens a file with the given flags. It is invalid to pass a null
   // callback. If PLATFORM_FILE_CREATE is set in |file_flags| it always tries to
   // create a new file at the given |file_path| and calls back with
@@ -167,19 +164,6 @@
       PlatformFile file,
       const StatusCallback& callback);
 
-  // Relay helpers.
-  static bool RelayCreateOrOpen(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
-      const CreateOrOpenTask& open_task,
-      const CloseTask& close_task,
-      const CreateOrOpenCallback& callback);
-
-  static bool RelayClose(
-      scoped_refptr<MessageLoopProxy> message_loop_proxy,
-      const CloseTask& close_task,
-      PlatformFile,
-      const StatusCallback& callback);
-
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(FileUtilProxy);
 };