Use DidFinishNavigation callback in LanguageDetectionController.

components/translate/ios/browser/language_detection_controller.h

Index: components/translate/ios/browser/language_detection_controller.h
diff --git a/components/translate/ios/browser/language_detection_controller.h b/components/translate/ios/browser/language_detection_controller.h
index 72a3d5bc657b20ad4b1c6131133155724a5d1408..c3271e829dcb331e39206b28f2940916aa46a298 100644
--- a/components/translate/ios/browser/language_detection_controller.h
+++ b/components/translate/ios/browser/language_detection_controller.h
@@ -25,6 +25,7 @@ class DictionaryValue;
 }
 
 namespace web {
+class NavigationContext;
 class WebState;
 }
 
@@ -78,8 +79,7 @@ class LanguageDetectionController : public web::WebStateObserver {
   // 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_;