Updates language model on iOS.

ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm

 // 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.
 
 #include "ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.h"
 
 #include <map>
 #include <set>
 #include <string>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/user_metrics.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
 #include "components/autofill/core/browser/webdata/autofill_webdata_service.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/omnibox/browser/omnibox_pref_names.h"
 #include "components/password_manager/core/browser/password_store.h"
 #include "components/prefs/pref_service.h"
 #include "components/search_engines/template_url_service.h"
 #include "components/sessions/core/tab_restore_service.h"
+#include "components/translate/core/browser/language_model.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/autofill/personal_data_manager_factory.h"
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #include "ios/chrome/browser/history/history_service_factory.h"
 #include "ios/chrome/browser/history/web_history_service_factory.h"
 #include "ios/chrome/browser/ios_chrome_io_thread.h"
 #include "ios/chrome/browser/passwords/ios_chrome_password_store_factory.h"
 #include "ios/chrome/browser/search_engines/template_url_service_factory.h"
 #include "ios/chrome/browser/sessions/ios_chrome_tab_restore_service_factory.h"
+#include "ios/chrome/browser/translate/language_model_factory.h"
 #include "ios/chrome/browser/web_data_service_factory.h"
 #include "ios/net/http_cache_helper.h"
 #include "ios/public/provider/chrome/browser/chrome_browser_provider.h"
 #include "ios/web/public/web_thread.h"
 #include "net/base/net_errors.h"
 #include "net/cookies/cookie_store.h"
 #include "net/http/transport_security_state.h"
 #include "net/ssl/channel_id_service.h"
 #include "net/ssl/channel_id_store.h"
 #include "net/url_request/url_request_context.h"
@@ skipping 192 matching lines @@
           base::Bind(&IOSChromeBrowsingDataRemover::OnClearedAutofillOriginURLs,
                      base::Unretained(this)));
 
       autofill::PersonalDataManager* data_manager =
           autofill::PersonalDataManagerFactory::GetForBrowserState(
               browser_state_);
       if (data_manager)
         data_manager->Refresh();
     }
 
+    // Remove language model history.
+    translate::LanguageModel* language_model =
+        LanguageModelFactory::GetForBrowserState(browser_state_);
+    if (language_model) {
+      language_model->ClearHistory(delete_begin_, delete_end_);
+    }
   }
 
   if (remove_mask & REMOVE_COOKIES) {
     base::RecordAction(UserMetricsAction("ClearBrowsingData_Cookies"));
 
     ++waiting_for_clear_cookies_count_;
     WebThread::PostTask(
         WebThread::IO, FROM_HERE,
         base::Bind(&IOSChromeBrowsingDataRemover::ClearCookiesOnIOThread,
                    base::Unretained(this), main_context_getter_));
@@ skipping 249 matching lines @@
   waiting_for_clear_autofill_origin_urls_ = false;
   NotifyAndDeleteIfDone();
 }
 
 // static
 IOSChromeBrowsingDataRemover::CallbackSubscription
 IOSChromeBrowsingDataRemover::RegisterOnBrowsingDataRemovedCallback(
     const IOSChromeBrowsingDataRemover::Callback& callback) {
   return GetOnBrowsingDataRemovedCallbacks()->Add(callback);
 }