Updates language model on iOS.

components/translate/ios/browser/ios_translate_driver.h

 // 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.
 
 #ifndef COMPONENTS_TRANSLATE_IOS_BROWSER_IOS_TRANSLATE_DRIVER_H_
 #define COMPONENTS_TRANSLATE_IOS_BROWSER_IOS_TRANSLATE_DRIVER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "components/translate/core/browser/translate_driver.h"
 #include "components/translate/ios/browser/language_detection_controller.h"
 #include "components/translate/ios/browser/translate_controller.h"
 #include "ios/web/public/web_state/web_state_observer.h"
 
 @class CRWJSInjectionReceiver;
 
 namespace web {
 class NavigationManager;
 class WebState;
 }
 
 namespace translate {
 
 class TranslateManager;
+class LanguageModel;
 
 // Content implementation of TranslateDriver.
 class IOSTranslateDriver : public TranslateDriver,
                            public TranslateController::Observer,
                            public web::WebStateObserver {
  public:
   IOSTranslateDriver(web::WebState* web_state,
                      web::NavigationManager* navigation_manager,
-                     TranslateManager* translate_manager);
+                     TranslateManager* translate_manager,
+                     LanguageModel* language_model);
   ~IOSTranslateDriver() override;
 
   LanguageDetectionController* language_detection_controller() {
     return language_detection_controller_.get();
   }
 
   TranslateController* translate_controller() {
     return translate_controller_.get();
   }
 
@@ skipping 44 matching lines @@
   void OnTranslateScriptReady(bool success,
                               double load_time,
                               double ready_time) override;
   void OnTranslateComplete(bool success,
                            const std::string& original_language,
                            double translation_time) override;
 
   // The navigation manager of the tab we are associated with.
   web::NavigationManager* navigation_manager_;
 
+  // Model to be notified about detected language of every page visited.
+  translate::LanguageModel* language_model_;
+
   base::WeakPtr<TranslateManager> translate_manager_;
   std::unique_ptr<TranslateController> translate_controller_;
   std::unique_ptr<LanguageDetectionController> language_detection_controller_;
   std::unique_ptr<LanguageDetectionController::CallbackList::Subscription>
       language_detection_callback_subscription_;
 
   // An ever-increasing sequence number of the current page, used to match up
   // translation requests with responses.
   // This matches the similar field in TranslateHelper in the renderer on other
   // platforms.
   int page_seq_no_;
 
   // When a translation is in progress, its page sequence number is stored in
   // |pending_page_seq_no_|.
   int pending_page_seq_no_;
 
   // Parameters of the current translation.
   std::string source_language_;
   std::string target_language_;
 
   base::WeakPtrFactory<IOSTranslateDriver> weak_method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(IOSTranslateDriver);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_IOS_BROWSER_IOS_TRANSLATE_DRIVER_H_