Remove direct references to hermetic mac toolchain.

build/config/mac/rules.gni

 # Copyright 2015 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/base_rules.gni")
 
 # Generates Info.plist files for Mac apps and frameworks.
 #
 # Arguments
 #
@@ skipping 25 matching lines @@
     _info_plist = _info_plist_target_output[0]
   }
 
   info_plist(target_name) {
     format = "xml1"
     extra_substitutions = []
     if (defined(invoker.extra_substitutions)) {
       extra_substitutions = invoker.extra_substitutions
     }
     extra_substitutions += [
-      "MAC_SDK_BUILD=$mac_sdk_build",
+      "MAC_SDK_BUILD=$mac_sdk_version",
       "MAC_SDK_NAME=$mac_sdk_name$mac_sdk_version",
     ]
     plist_templates = [
       "//build/config/mac/BuildInfo.plist",
       _info_plist,
     ]
     if (defined(invoker.info_plist_target)) {
       deps = [
         invoker.info_plist_target,
       ]
@@ skipping 575 matching lines @@
                            ])
     if (!defined(deps)) {
       deps = []
     }
     deps += [ ":$_loadable_module_bundle_data" ]
 
     bundle_root_dir = "$root_out_dir/$_output_name.plugin/Contents"
     bundle_executable_dir = "$bundle_root_dir/MacOS"
   }
 }