Complete WebStateObserverBridge and follow Cocoa naming style.

components/translate/ios/browser/language_detection_controller.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/language_detection_controller.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/logging.h"
@@ skipping 115 matching lines @@
 }
 
 // web::WebStateObserver implementation:
 
 void LanguageDetectionController::PageLoaded(
     web::PageLoadCompletionStatus load_completion_status) {
   if (load_completion_status == web::PageLoadCompletionStatus::SUCCESS)
     StartLanguageDetection();
 }
 
-void LanguageDetectionController::URLHashChanged() {
+void LanguageDetectionController::UrlHashChanged() {
   StartLanguageDetection();
 }
 
 void LanguageDetectionController::HistoryStateChanged() {
   StartLanguageDetection();
 }
 
 void LanguageDetectionController::WebStateDestroyed() {
   web_state()->RemoveScriptCommandCallback(kCommandPrefix);
 }
 
 }  // namespace translate