Expose way to enable/disable translate.

ios/web_view/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.
 
 import("//build/config/ios/ios_sdk.gni")
 import("//build/config/ios/rules.gni")
 import("//components/grpc_support/include/headers.gni")
 import("//ios/build/config.gni")
 import("//testing/test.gni")
 import("//tools/grit/repack.gni")
@@ skipping 11 matching lines @@
 # These variables are used to share framework sources with both ChromeWebView
 # and CrNetChromeWebView frameworks.
 ios_web_view_public_headers = [
   "public/ChromeWebView.h",
   "public/cwv_export.h",
   "public/cwv_html_element.h",
   "public/cwv_navigation_action.h",
   "public/cwv_navigation_delegate.h",
   "public/cwv_scroll_view.h",
   "public/cwv_scroll_view_delegate.h",
+  "public/cwv_translation_configuration.h",
   "public/cwv_translation_controller.h",
   "public/cwv_translation_controller_delegate.h",
   "public/cwv_translation_language.h",
   "public/cwv_translation_policy.h",
   "public/cwv_ui_delegate.h",
   "public/cwv_user_content_controller.h",
   "public/cwv_user_script.h",
   "public/cwv_web_view.h",
   "public/cwv_web_view_configuration.h",
 ]
@@ skipping 10 matching lines @@
   "internal/cwv_scroll_view.mm",
   "internal/cwv_scroll_view_internal.h",
   "internal/cwv_user_content_controller.mm",
   "internal/cwv_user_content_controller_internal.h",
   "internal/cwv_user_script.mm",
   "internal/cwv_web_view.mm",
   "internal/cwv_web_view_configuration.mm",
   "internal/cwv_web_view_configuration_internal.h",
   "internal/pref_names.cc",
   "internal/pref_names.h",
+  "internal/translate/cwv_translation_configuration.mm",
+  "internal/translate/cwv_translation_configuration_internal.h",
   "internal/translate/cwv_translation_controller.mm",
   "internal/translate/cwv_translation_controller_internal.h",
   "internal/translate/cwv_translation_language_internal.h",
   "internal/translate/cwv_translation_language.mm",
   "internal/translate/cwv_translation_policy.mm",
   "internal/translate/web_view_translate_accept_languages_factory.cc",
   "internal/translate/web_view_translate_accept_languages_factory.h",
   "internal/translate/web_view_translate_client.h",
   "internal/translate/web_view_translate_client.mm",
   "internal/translate/web_view_translate_ranker_factory.cc",
@@ skipping 220 matching lines @@
   }
 
   group("cronet_ios_web_view_package") {
     deps = [
       ":cronet_ios_web_view_dsym_archive",
       ":cronet_ios_web_view_generate_license",
       ":cronet_ios_web_view_package_copy",
     ]
   }
 }