Bindings: Require [CachedAttribute] method to be const

third_party/WebKit/Source/core/frame/NavigatorLanguage.cpp

 // 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 "core/frame/NavigatorLanguage.h"
 
 #include "platform/Language.h"
 
 namespace blink {
 
-NavigatorLanguage::NavigatorLanguage() : languages_changed_(true) {}
+NavigatorLanguage::NavigatorLanguage() {}
 
 AtomicString NavigatorLanguage::language() {
   return DefaultLanguage();
 }
 
-bool NavigatorLanguage::hasLanguagesChanged() {
-  if (!languages_changed_)
-    return false;
-
-  languages_changed_ = false;
-  return true;
+bool NavigatorLanguage::hasLanguagesChanged() const {
+  return languages_changed_;
 }
 
 void NavigatorLanguage::SetLanguagesChanged() {
   languages_changed_ = true;
 }
 
 }  // namespace blink