Updates language model on iOS.

components/translate/ios/browser/ios_translate_driver.mm

 // Copyright 2014 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 "components/translate/ios/browser/ios_translate_driver.h"
 
 #include "base/bind.h"
 #include "base/logging.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
+#include "components/translate/core/browser/language_model.h"
 #include "components/translate/core/browser/translate_client.h"
 #include "components/translate/core/browser/translate_manager.h"
 #include "components/translate/core/common/translate_constants.h"
 #include "components/translate/core/common/translate_errors.h"
 #include "components/translate/core/common/translate_metrics.h"
 #import "components/translate/ios/browser/js_language_detection_manager.h"
 #import "components/translate/ios/browser/js_translate_manager.h"
 #import "components/translate/ios/browser/language_detection_controller.h"
 #import "components/translate/ios/browser/translate_controller.h"
 #include "ios/web/public/browser_state.h"
@@ skipping 20 matching lines @@
 // translate_ios.js.
 const int kTranslateStatusCheckDelayMs = 400;
 // Language name passed to the Translate element for it to detect the language.
 const char kAutoDetectionLanguage[] = "auto";
 
 }  // namespace
 
 IOSTranslateDriver::IOSTranslateDriver(
     web::WebState* web_state,
     web::NavigationManager* navigation_manager,
-    TranslateManager* translate_manager)
+    TranslateManager* translate_manager,
+    LanguageModel* language_model)
     : web::WebStateObserver(web_state),
       navigation_manager_(navigation_manager),
+      language_model_(language_model),
       translate_manager_(translate_manager->GetWeakPtr()),
       page_seq_no_(0),
       pending_page_seq_no_(0),
       weak_method_factory_(this) {
   DCHECK(navigation_manager_);
   DCHECK(translate_manager_);
   DCHECK(web::WebStateObserver::web_state());
 
   CRWJSInjectionReceiver* receiver = web_state->GetJSInjectionReceiver();
   DCHECK(receiver);
@@ skipping 20 matching lines @@
 IOSTranslateDriver::~IOSTranslateDriver() {
 }
 
 void IOSTranslateDriver::OnLanguageDetermined(
     const LanguageDetectionController::DetectionDetails& details) {
   if (!translate_manager_)
     return;
   translate_manager_->GetLanguageState().LanguageDetermined(
       details.adopted_language, true);
 
+  // Update language model.
+  if (language_model_ && details.is_cld_reliable) {
+    language_model_->OnPageVisited(details.cld_language);
+  }
+
   if (web_state())
     translate_manager_->InitiateTranslation(details.adopted_language);
 }
 
 // web::WebStateObserver methods
 
 void IOSTranslateDriver::NavigationItemCommitted(
     const web::LoadCommittedDetails& load_details) {
   // Interrupt pending translations and reset various data when a navigation
   // happens. Desktop does it by tracking changes in the page ID, and
@@ skipping 154 matching lines @@
     translate_manager_->PageTranslated(source_language_, target_language_,
                                        TranslateErrors::TRANSLATION_ERROR);
   }
 
   TranslationDidSucceed(source_language_, target_language_,
                         pending_page_seq_no_, original_language,
                         translation_time);
 }
 
 }  // namespace translate