Validate origins when generating subdomain tokens

tools/origin_trials/validate_subdomain_origin/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("infoplist_strings_tool") {
+import("//build/symlink.gni")
+
+executable("validate_subdomain_origin") {
+  output_name = "validate_subdomain_origin"
+  sources = [
+    "validate_subdomain_origin.cc",
+  ]
+
   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",
+    "//net",
+    "//url",
   ]
-
-  libs = [ "Foundation.framework" ]
 }