[ios] Adds configuration helper files for voice search.

ios/public/provider/chrome/browser/BUILD.gn

 # 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.
 
 source_set("browser") {
   sources = [
     "browser_constants.cc",
     "browser_constants.h",
     "chrome_browser_provider.h",
     "chrome_browser_provider.mm",
@@ skipping 11 matching lines @@
     "signin/signin_resources_provider.h",
     "signin/signin_resources_provider.mm",
     "ui/app_rating_prompt.h",
     "ui/default_ios_web_view_factory.h",
     "ui/default_ios_web_view_factory.mm",
     "ui/infobar_view_delegate.h",
     "ui/infobar_view_protocol.h",
     "ui/text_field_styling.h",
     "updatable_resource_provider.h",
     "updatable_resource_provider.mm",
+    "voice/voice_search_language.h",
+    "voice/voice_search_language.mm",
   ]
 
   deps = [
     "//base",
     "//components/autofill/core/browser",
     "//components/favicon_base",
     "//components/metrics",
     "//components/sync_sessions",
     "//ios/public/provider/web",
     "//ios/web",
@@ skipping 19 matching lines @@
   ]
 
   deps = [
     ":browser",
     "//base",
     "//components/signin/ios/browser:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }