Refactor the bootstrap sandbox process launching integration.

sandbox/mac/BUILD.gn

 # Copyright 2014 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.
 
 import("//build/config/mac/mac_sdk.gni")
 import("//testing/test.gni")
 
 generate_stubs_script = "//tools/generate_stubs/generate_stubs.py"
 generate_stubs_header = "xpc_stubs_header.fragment"
 generate_stubs_sig_public = "xpc_stubs.sig"
@@ skipping 39 matching lines @@
     "bootstrap_sandbox.h",
     "launchd_interception_server.cc",
     "launchd_interception_server.h",
     "mach_message_server.cc",
     "mach_message_server.h",
     "message_server.h",
     "os_compatibility.cc",
     "os_compatibility.h",
     "policy.cc",
     "policy.h",
+    "pre_exec_delegate.cc",
+    "pre_exec_delegate.h",
     "xpc.cc",
     "xpc.h",
     "xpc_message_server.cc",
     "xpc_message_server.h",
   ]
 
   defines = [ "SANDBOX_IMPLEMENTATION" ]
   libs = [ "bsm" ]
 
   deps = [
@@ skipping 22 matching lines @@
     "Foundation.framework",
   ]
 
   deps = [
     ":sandbox",
     "//base",
     "//base/test:run_all_unittests",
     "//testing/gtest",
   ]
 }