Back out trunk r103089 because it caused bug 98550.

chrome/app/chrome_main_mac.h

Index: chrome/app/chrome_main_mac.h
===================================================================
--- chrome/app/chrome_main_mac.h	(revision 103301)
+++ chrome/app/chrome_main_mac.h	(working copy)
@@ -19,27 +19,4 @@
 // 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_