[WebLayer] Add initial infrastructure to support translate

This CL adds the first pieces of infrastructure that will be necessary
to integrate //components/translate in WebLayer:
- Registration of the relevant prefs
- A KeyedServiceFactory for the first of several services that will be
  needed to glue the component to //weblayer

The factory is adapted in a straightforward way from the corresponding
one in //chrome.

Bug: 1025620
Change-Id: I4832388b45cfcf6b70ea06245a82aee1c4bb3326
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2152815
Commit-Queue: Colin Blundell <blundell@chromium.org>
Reviewed-by: Clark DuVall <cduvall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#760429}

weblayer/BUILD.gn

@@ -181,6 +181,8 @@ source_set("weblayer_lib_base") {
     "browser/tab_impl.h",
     "browser/tab_specific_content_settings_delegate.cc",
     "browser/tab_specific_content_settings_delegate.h",
+    "browser/translate_accept_languages_factory.cc",
+    "browser/translate_accept_languages_factory.h",
     "browser/url_bar/autocomplete_scheme_classifier_impl.cc",
     "browser/url_bar/autocomplete_scheme_classifier_impl.h",
     "browser/url_bar/url_bar_controller_impl.cc",
@@ -271,6 +273,7 @@ source_set("weblayer_lib_base") {
     "//components/embedder_support/origin_trials",
     "//components/find_in_page",
     "//components/keyed_service/content",
+    "//components/language/core/browser",
     "//components/metrics",
     "//components/network_time",
     "//components/omnibox/browser",
@@ -289,6 +292,7 @@ source_set("weblayer_lib_base") {
     "//components/ssl_errors",
     "//components/startup_metric_utils/browser",
     "//components/strings",
+    "//components/translate/core/browser",
     "//components/user_prefs",
     "//components/variations",
     "//components/variations/net",

weblayer/browser/DEPS

@@ -19,6 +19,8 @@ include_rules = [
   "+components/find_in_page",
   "+components/javascript_dialogs",
   "+components/keyed_service/content",
+  "+components/language/core/browser",
+  "+components/translate/core/browser",
   "+components/metrics",
   "+components/navigation_interception",
   "+components/network_time",

weblayer/browser/browser_context_impl.cc

@@ -10,6 +10,7 @@
 #include "components/download/public/common/in_progress_download_manager.h"
 #include "components/embedder_support/pref_names.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "components/language/core/browser/language_prefs.h"
 #include "components/permissions/permission_manager.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "components/prefs/in_memory_pref_store.h"
@@ -19,6 +20,8 @@
 #include "components/safe_browsing/core/common/safe_browsing_prefs.h"
 #include "components/security_interstitials/content/stateful_ssl_host_state_delegate.h"
 #include "components/security_state/core/security_state.h"
+#include "components/translate/core/browser/translate_pref_names.h"
+#include "components/translate/core/browser/translate_prefs.h"
 #include "components/user_prefs/user_prefs.h"
 #include "components/variations/variations_client.h"
 #include "components/variations/variations_http_header_provider.h"
@@ -235,6 +238,11 @@ void BrowserContextImpl::RegisterPrefs(
   HostContentSettingsMap::RegisterProfilePrefs(pref_registry);
   safe_browsing::RegisterProfilePrefs(pref_registry);
   security_state::RegisterProfilePrefs(pref_registry);
+  language::LanguagePrefs::RegisterProfilePrefs(pref_registry);
+  translate::TranslatePrefs::RegisterProfilePrefs(pref_registry);
+  pref_registry->RegisterBooleanPref(
+      prefs::kOfferTranslateEnabled, true,
+      user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
 #if defined(OS_ANDROID)
   cdm::MediaDrmStorageImpl::RegisterProfilePrefs(pref_registry);
   permissions::GeolocationPermissionContextAndroid::RegisterProfilePrefs(

weblayer/browser/browser_main_parts_impl.cc

@@ -27,6 +27,7 @@
 #include "weblayer/browser/host_content_settings_map_factory.h"
 #include "weblayer/browser/permissions/weblayer_permissions_client.h"
 #include "weblayer/browser/stateful_ssl_host_state_delegate_factory.h"
+#include "weblayer/browser/translate_accept_languages_factory.h"
 #include "weblayer/browser/webui/web_ui_controller_factory.h"
 #include "weblayer/public/main.h"
 
@@ -70,6 +71,7 @@ void EnsureBrowserContextKeyedServiceFactoriesBuilt() {
   HostContentSettingsMapFactory::GetInstance();
   StatefulSSLHostStateDelegateFactory::GetInstance();
   CookieSettingsFactory::GetInstance();
+  TranslateAcceptLanguagesFactory::GetInstance();
 }
 
 void StopMessageLoop(base::OnceClosure quit_closure) {

weblayer/browser/translate_accept_languages_factory.cc

+// Copyright 2020 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.
+
+#include "weblayer/browser/translate_accept_languages_factory.h"
+
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+#include "components/language/core/browser/pref_names.h"
+#include "components/prefs/pref_service.h"
+#include "components/translate/core/browser/translate_accept_languages.h"
+#include "components/user_prefs/user_prefs.h"
+#include "content/public/browser/browser_context.h"
+
+namespace weblayer {
+
+// static
+translate::TranslateAcceptLanguages*
+TranslateAcceptLanguagesFactory::GetForBrowserContext(
+    content::BrowserContext* context) {
+  return static_cast<translate::TranslateAcceptLanguages*>(
+      GetInstance()->GetServiceForBrowserContext(context, true));
+}
+
+// static
+TranslateAcceptLanguagesFactory*
+TranslateAcceptLanguagesFactory::GetInstance() {
+  static base::NoDestructor<TranslateAcceptLanguagesFactory> factory;
+  return factory.get();
+}
+
+TranslateAcceptLanguagesFactory::TranslateAcceptLanguagesFactory()
+    : BrowserContextKeyedServiceFactory(
+          "TranslateAcceptLanguages",
+          BrowserContextDependencyManager::GetInstance()) {}
+
+TranslateAcceptLanguagesFactory::~TranslateAcceptLanguagesFactory() = default;
+
+KeyedService* TranslateAcceptLanguagesFactory::BuildServiceInstanceFor(
+    content::BrowserContext* browser_context) const {
+  return new translate::TranslateAcceptLanguages(
+      user_prefs::UserPrefs::Get(browser_context),
+      language::prefs::kAcceptLanguages);
+}
+
+content::BrowserContext*
+TranslateAcceptLanguagesFactory::GetBrowserContextToUse(
+    content::BrowserContext* context) const {
+  return context;
+}
+
+}  // namespace weblayer

weblayer/browser/translate_accept_languages_factory.h

+// Copyright 2020 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.
+
+#ifndef WEBLAYER_BROWSER_TRANSLATE_ACCEPT_LANGUAGES_FACTORY_H_
+#define WEBLAYER_BROWSER_TRANSLATE_ACCEPT_LANGUAGES_FACTORY_H_
+
+#include "base/no_destructor.h"
+#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
+
+namespace translate {
+class TranslateAcceptLanguages;
+}
+
+namespace weblayer {
+
+// TranslateAcceptLanguagesFactory is a way to associate a
+// TranslateAcceptLanguages instance to a BrowserContext.
+class TranslateAcceptLanguagesFactory
+    : public BrowserContextKeyedServiceFactory {
+ public:
+  TranslateAcceptLanguagesFactory(const TranslateAcceptLanguagesFactory&) =
+      delete;
+  TranslateAcceptLanguagesFactory& operator=(
+      const TranslateAcceptLanguagesFactory&) = delete;
+
+  static translate::TranslateAcceptLanguages* GetForBrowserContext(
+      content::BrowserContext* browser_context);
+  static TranslateAcceptLanguagesFactory* GetInstance();
+
+ private:
+  friend class base::NoDestructor<TranslateAcceptLanguagesFactory>;
+
+  TranslateAcceptLanguagesFactory();
+  ~TranslateAcceptLanguagesFactory() override;
+
+  // BrowserContextKeyedServiceFactory:
+  KeyedService* BuildServiceInstanceFor(
+      content::BrowserContext* profile) const override;
+  content::BrowserContext* GetBrowserContextToUse(
+      content::BrowserContext* context) const override;
+};
+
+}  // namespace weblayer
+
+#endif  // WEBLAYER_BROWSER_TRANSLATE_ACCEPT_LANGUAGES_FACTORY_H_