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

chrome/tools/mac_helpers/BUILD.gn

Index: chrome/tools/mac_helpers/BUILD.gn
diff --git a/chrome/tools/mac_helpers/BUILD.gn b/chrome/tools/mac_helpers/BUILD.gn
deleted file mode 100644
index 2beb33b6c8a30841f408f778577126be8363d87b..0000000000000000000000000000000000000000
--- a/chrome/tools/mac_helpers/BUILD.gn
+++ /dev/null
@@ -1,21 +0,0 @@
-# Copyright 2016 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.
-
-executable("infoplist_strings_tool") {
-  configs += [ "//build/config/compiler:wexit_time_destructors" ]
-
-  sources = [
-    "infoplist_strings_util.mm",
-  ]
-
-  deps = [
-    "//base",
-    "//base:i18n",
-    "//chrome:strings",
-    "//third_party/icu",
-    "//ui/base:ui_data_pack",
-  ]
-
-  libs = [ "Foundation.framework" ]
-}