Implemented new Translate API for purely Objective-C clients.

ios/web_view/BUILD.gn

Index: ios/web_view/BUILD.gn
diff --git a/ios/web_view/BUILD.gn b/ios/web_view/BUILD.gn
index a3c8d335dda2a38804b77f8c5966a4cdf28b4453..01a4d6c355a2281621b26b8d9fd2ef4db122d242 100644
--- a/ios/web_view/BUILD.gn
+++ b/ios/web_view/BUILD.gn
@@ -22,12 +22,14 @@ ios_web_view_public_headers = [
   "public/ChromeWebView.h",
   "public/cwv_export.h",
   "public/cwv_html_element.h",
+  "public/cwv_language_detection_result.h",
   "public/cwv_navigation_action.h",
   "public/cwv_navigation_delegate.h",
   "public/cwv_scroll_view.h",
   "public/cwv_scroll_view_delegate.h",
-  "public/cwv_translate_delegate.h",
-  "public/cwv_translate_manager.h",
+  "public/cwv_translation_controller.h",
+  "public/cwv_translation_controller_delegate.h",
+  "public/cwv_translation_language.h",
   "public/cwv_ui_delegate.h",
   "public/cwv_user_content_controller.h",
   "public/cwv_user_script.h",
@@ -50,8 +52,12 @@ ios_web_view_sources = [
   "internal/cwv_web_view_configuration_internal.h",
   "internal/pref_names.cc",
   "internal/pref_names.h",
-  "internal/translate/cwv_translate_manager_impl.h",
-  "internal/translate/cwv_translate_manager_impl.mm",
+  "internal/translate/cwv_language_detection_result_internal.h",
+  "internal/translate/cwv_language_detection_result.mm",
+  "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/web_view_translate_accept_languages_factory.cc",
   "internal/translate/web_view_translate_accept_languages_factory.h",
   "internal/translate/web_view_translate_client.h",