Break two classes defined in json_value_serializer.cc, .h into separate files.

chrome/browser/policy/config_dir_policy_provider.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/policy/config_dir_policy_provider.h"
 
 #include <algorithm>
 #include <set>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
-#include "base/json/json_value_serializer.h"
+#include "base/json/json_file_value_serializer.h"
 #include "base/logging.h"
 #include "base/platform_file.h"
 #include "chrome/browser/policy/policy_map.h"
 
 namespace policy {
 
 ConfigDirPolicyProviderDelegate::ConfigDirPolicyProviderDelegate(
     const FilePath& config_dir,
     PolicyLevel level,
     PolicyScope scope)
@@ skipping 70 matching lines @@
 ConfigDirPolicyProvider::ConfigDirPolicyProvider(
     const PolicyDefinitionList* policy_list,
     PolicyLevel level,
     PolicyScope scope,
     const FilePath& config_dir)
     : FileBasedPolicyProvider(
         policy_list,
         new ConfigDirPolicyProviderDelegate(config_dir, level, scope)) {}
 
 }  // namespace policy