Correct const accessors in base/values.(h|cc)

chrome/browser/web_resource/notification_promo.cc

 // Copyright (c) 2012 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 "chrome/browser/web_resource/notification_promo.h"
 
 #include <cmath>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 196 matching lines @@
       closed_(false),
       gplus_required_(false),
       new_notification_(false) {
   DCHECK(profile);
   DCHECK(prefs_);
 }
 
 NotificationPromo::~NotificationPromo() {}
 
 void NotificationPromo::InitFromJson(const DictionaryValue& json) {
-  ListValue* promo_list = NULL;
+  const ListValue* promo_list = NULL;
 #if !defined(OS_ANDROID)
   if (!json.GetList(promo_type_, &promo_list))
     return;
 #else
   if (!json.GetList("mobile_ntp_sync_promo", &promo_list)) {
     LOG(ERROR) << "Malfromed JSON: not a mobile_ntp_sync_promo";
     return;
   }
 #endif  // !defined(OS_ANDROID)
 
@@ skipping 174 matching lines @@
   promo_dict.Set(promo_type_, promo_list);
   prefs_->Set(kPrefPromoObject, promo_dict);
 }
 
 void NotificationPromo::InitFromPrefs() {
   const base::DictionaryValue* promo_dict =
       prefs_->GetDictionary(kPrefPromoObject);
   if (!promo_dict)
     return;
 
-  base::ListValue* promo_list(NULL);
+  const base::ListValue* promo_list(NULL);
   promo_dict->GetList(promo_type_, &promo_list);
   if (!promo_list)
     return;
 
   base::DictionaryValue* ntp_promo(NULL);
   promo_list->GetDictionary(0, &ntp_promo);
   if (!ntp_promo)
     return;
 
   ntp_promo->GetString(kPrefPromoText, &promo_text_);
@@ skipping 81 matching lines @@
   if (group_ < initial_segment_)
     return start_;
   return start_ +
       std::ceil(static_cast<float>(group_ - initial_segment_ + 1) / increment_)
       * time_slice_;
 }
 
 double NotificationPromo::EndTime() const {
   return end_;
 }