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

chrome/browser/content_settings/host_content_settings_map_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.
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
 #include "base/json/json_reader.h"
 #include "base/json/json_writer.h"
 #include "base/message_loop.h"
 #include "chrome/browser/content_settings/content_settings_details.h"
@@ skipping 695 matching lines @@
 
     DictionaryValue* dummy_payload = new DictionaryValue;
     dummy_payload->SetInteger("images", CONTENT_SETTING_ALLOW);
     all_settings_dictionary->SetWithoutPathExpansion("[*.]\xC4\x87ira.com,*",
                                                      dummy_payload);
   }
   profile.GetHostContentSettingsMap();
 
   const DictionaryValue* all_settings_dictionary =
       prefs->GetDictionary(prefs::kContentSettingsPatternPairs);
-  DictionaryValue* result = NULL;
+  const DictionaryValue* result = NULL;
   EXPECT_FALSE(all_settings_dictionary->GetDictionaryWithoutPathExpansion(
       "[*.]\xC4\x87ira.com,*", &result));
   EXPECT_TRUE(all_settings_dictionary->GetDictionaryWithoutPathExpansion(
       "[*.]xn--ira-ppa.com,*", &result));
 }
 
 // If both Unicode and its punycode pattern exist, make sure we don't touch the
 // settings for the punycode, and that Unicode pattern gets deleted.
 TEST_F(HostContentSettingsMapTest, CanonicalizeExceptionsUnicodeAndPunycode) {
   TestingProfile profile;
@@ skipping 346 matching lines @@
                 GURL("http://other.com"),
                 CONTENT_SETTINGS_TYPE_COOKIES,
                 std::string()));
   EXPECT_EQ(CONTENT_SETTING_SESSION_ONLY,
             host_content_settings_map->GetContentSetting(
                 GURL("http://third.com"),
                 GURL("http://third.com"),
                 CONTENT_SETTINGS_TYPE_COOKIES,
                 std::string()));
 }