Use DidFinishNavigation callback in LanguageDetectionController.

components/translate/ios/browser/language_detection_controller.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_LANGUAGE_DETECTION_CONTROLLER_H_
 #define COMPONENTS_TRANSLATE_IOS_BROWSER_LANGUAGE_DETECTION_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 
 #include "base/callback_list.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "components/prefs/pref_member.h"
 #include "ios/web/public/web_state/web_state_observer.h"
 
 class GURL;
 @class JsLanguageDetectionManager;
 class PrefService;
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace web {
+class NavigationContext;
 class WebState;
 }
 
 namespace translate {
 
 class LanguageDetectionController : public web::WebStateObserver {
  public:
   // Language detection details, passed to language detection callbacks.
   struct DetectionDetails {
     // The language detected by the content (Content-Language).
@@ skipping 33 matching lines @@
 
   // Completion handler used to retrieve the text buffered by the
   // JsLanguageDetectionManager.
   void OnTextRetrieved(const std::string& http_content_language,
                        const std::string& html_lang,
                        const base::string16& text);
 
   // web::WebStateObserver implementation:
   void PageLoaded(
       web::PageLoadCompletionStatus load_completion_status) override;
-  void UrlHashChanged() override;
-  void HistoryStateChanged() override;
+  void DidFinishNavigation(web::NavigationContext* navigation_context) override;
   void WebStateDestroyed() override;
 
   CallbackList language_detection_callbacks_;
   JsLanguageDetectionManager* js_manager_;
   BooleanPrefMember translate_enabled_;
   base::WeakPtrFactory<LanguageDetectionController> weak_method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(LanguageDetectionController);
 };
 
 }  // namespace translate
 
 #endif  // COMPONENTS_TRANSLATE_IOS_BROWSER_LANGUAGE_DETECTION_CONTROLLER_H_