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

cloud_print/service/service_state.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 "cloud_print/service/service_state.h"
 
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 85 matching lines @@
 bool ServiceState::FromString(const std::string& json) {
   Reset();
   scoped_ptr<base::Value> data(base::JSONReader::Read(json));
   if (!data.get())
     return false;
 
   const base::DictionaryValue* services = NULL;
   if (!data->GetAsDictionary(&services))
     return false;
 
-  base::DictionaryValue* cloud_print = NULL;
+  const base::DictionaryValue* cloud_print = NULL;
   if (!services->GetDictionary(kCloudPrintJsonName, &cloud_print))
     return false;
 
   bool valid_file = true;
   // Don't exit on fail. Collect all data for re-use by user later.
   if (!cloud_print->GetBoolean(kEnabledOptionName, &valid_file))
     valid_file = false;
 
   cloud_print->GetString(kEmailOptionName, &email_);
   cloud_print->GetString(kProxyIdOptionName, &proxy_id_);
@@ skipping 84 matching lines @@
                              const std::string& password,
                              const std::string& proxy_id) {
   robot_token_.clear();
   robot_email_.clear();
   email_ = email;
   proxy_id_ = proxy_id;
   auth_token_ = LoginToGoogle("cloudprint", email_, password);
   xmpp_auth_token_ = LoginToGoogle("chromiumsync", email_, password);
   return IsValid();
 }
-