Back out trunk r103089 because it caused bug 98550.

chrome/app/chrome_main_mac.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_APP_CHROME_MAIN_MAC_H_
 #define CHROME_APP_CHROME_MAIN_MAC_H_
 #pragma once
 
 class FilePath;
 
 // Checks if the UserDataDir policy has been set and returns its value in the
 // |user_data_dir| parameter. If no policy is set the parameter is not changed.
 void CheckUserDataDirPolicy(FilePath* user_data_dir);
 
 // Sets the app bundle (base::mac::MainAppBundle()) to the framework's bundle,
 // and sets the base bundle ID (base::mac::BaseBundleID()) to the proper value
 // based on the running application. The base bundle ID is the outer browser
 // application's bundle ID even when running in a non-browser (helper)
 // process.
 void SetUpBundleOverrides();
 
-// Creates a bootstrap subset port as a subset of the current bootstrap port,
-// tying its lifetime to the current task port, and switches the task's
-// bootstrap port to the new bootstrap subset port. Any subsequent bootstrap
-// servers created in the task via bootstrap_create_server and directed at the
-// bootstrap port will be created in the bootstrap subset port, meaning that
-// they will only be visible via bootstrap_look_up to this task and its
-// children, and that these mappings will be destroyed along with the subset
-// port as soon as this process exits.
-//
-// This scheme prevents bootstrap server mappings from leaking beyond this
-// process' lifetime. It also prevents any mappings from being visible by any
-// process other than this one and its children, but currently, nothing
-// requires this behavior. If anything ever does, this function could save the
-// original bootstrap port and make it available to things that need to call
-// bootstrap_create_server and create mappings with the original bootstrap
-// port.
-//
-// This needs to be called before anything calls bootstrap_create_server.
-// Currently, the only things that create bootstrap server mappings are
-// Breakpad and rohitfork.  To look for other users, search for
-// bootstrap_create_server and -[NSMachBootstrapServer registerPort:name:].
-void SwitchToMachBootstrapSubsetPort();
-
 #endif  // CHROME_APP_CHROME_MAIN_MAC_H_