Move //chrome/tools/mac_helpers:infoplist_strings_util to //chrome/tools/build/mac.

chrome/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/buildflag_header.gni")
 import("//build/config/chrome_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/compiler/pgo/pgo.gni")
 import("//build/config/features.gni")
 import("//build/config/locales.gni")
@@ skipping 538 matching lines @@
     # a saves file can be specified.
     if (enable_stripping) {
       remove_configs = [ "//build/config/mac:strip_all" ]
 
       ldflags =
           [ "-Wcrl,strip,-s," + rebase_path("app/app.saves", root_build_dir) ]
     }
   }
 
   compiled_action("chrome_app_strings") {
-    tool = "//chrome/tools/mac_helpers:infoplist_strings_tool"
+    tool = "//chrome/tools/build/mac:infoplist_strings_tool"
 
     inputs = [
       chrome_version_file,
     ]
 
     outputs = []
 
     foreach(locale, locales) {
       if (is_chrome_branded) {
         _strings_file = "google_chrome_strings"
@@ skipping 1162 matching lines @@
       "//chrome/app/theme/$branding_path_component/product_logo_48.png",
       "//chrome/tools/build/linux/chrome-wrapper",
       "//third_party/xdg-utils/scripts/xdg-mime",
       "//third_party/xdg-utils/scripts/xdg-settings",
     ]
     outputs = [
       "$root_out_dir/{{source_file_part}}",
     ]
   }
 }