Updates language model on iOS.

ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm

Index: ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm
diff --git a/ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm b/ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm
index 1600961322b0c4fb083f462fab1c96bb09539524..a9f0d068b55368b40d2722ff6865a1a1c8e20dc1 100644
--- a/ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm
+++ b/ios/chrome/browser/browsing_data/ios_chrome_browsing_data_remover.mm
@@ -24,6 +24,7 @@
 #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"
@@ -33,6 +34,7 @@
 #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"
@@ -245,6 +247,12 @@ void IOSChromeBrowsingDataRemover::RemoveImpl(int remove_mask) {
         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) {