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

sync/protocol/proto_value_conversions_unittest.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.
 
 // Keep this file in sync with the .proto files in this directory.
 
 #include "sync/protocol/proto_value_conversions.h"
 
 #include "base/memory/scoped_ptr.h"
 #include "base/values.h"
@@ skipping 174 matching lines @@
   scoped_ptr<DictionaryValue> value(EntitySpecificsToValue(specifics));
   EXPECT_EQ(MODEL_TYPE_COUNT - FIRST_REAL_MODEL_TYPE,
             static_cast<int>(value->size()));
 }
 
 namespace {
 // Returns whether the given value has specifics under the entries in the given
 // path.
 bool ValueHasSpecifics(const DictionaryValue& value,
                        const std::string& path) {
-  ListValue* entities_list = NULL;
+  const ListValue* entities_list = NULL;
   DictionaryValue* entry_dictionary = NULL;
   DictionaryValue* specifics_dictionary = NULL;
 
   if (!value.GetList(path, &entities_list))
     return false;
 
   if (!entities_list->GetDictionary(0, &entry_dictionary))
     return false;
 
   return entry_dictionary->GetDictionary("specifics",
@@ skipping 38 matching lines @@
 
   scoped_ptr<DictionaryValue> value_without_specifics(
       ClientToServerResponseToValue(message, false /* include_specifics */));
   EXPECT_FALSE(value_without_specifics->empty());
   EXPECT_FALSE(ValueHasSpecifics(*(value_without_specifics.get()),
                                  "get_updates.entries"));
 }
 
 }  // namespace
 }  // namespace syncer