Initial commit for Chrome metainstaller on Mac.

chrome/installer/mac/app/BUILD.gn

 # 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("generate_localizable_strings") {
+executable("downloader") {
   sources = [
-    "generate_localizable_strings.mm",
-  ]
-  deps = [
-    "//base",
-    "//ui/base:ui_data_pack",
+    "DownloadDelegate.m",
+    "Downloader.m",
+    "NetworkCommunication.m",
+    "OmahaCommunication.m",
+    "OmahaXMLParser.m",
+    "OmahaXMLRequest.m",
+    "SystemInfo.m",
+    "main.m",
   ]
   libs = [ "Foundation.framework" ]
 }