Introduce TranslateService and TranslateDownloadManager

tools/gn/secondary/components/translate/BUILD.gn

 # Copyright 2013 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.
 
 static_library("translate_core_browser") {
   external = true
 
   sources = [
     "core/browser/language_state.cc",
     "core/browser/language_state.h",
     "core/browser/page_translated_details.h",
     "core/browser/translate_browser_metrics.cc",
     "core/browser/translate_browser_metrics.h",
-    "core/browser/translate_delegate.h",
+    "core/browser/translate_download_manager.cc",
+    "core/browser/translate_download_manager.h",
     "core/browser/translate_driver.h",
     "core/browser/translate_error_details.h",
     "core/browser/translate_event_details.cc",
     "core/browser/translate_event_details.h",
     "core/browser/translate_url_fetcher.cc",
     "core/browser/translate_url_fetcher.h",
   ]
 
   deps = [
     ":translate_core_common",
@@ skipping 17 matching lines @@
     "core/common/translate_switches.h",
     "core/common/translate_util.cc",
     "core/common/translate_util.h",
   ]
 
   deps = [
     "//base",
     "//url",
   ]
 }