Remove base::StringValue

chrome/browser/extensions/api/sync_file_system/sync_file_system_api.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/extensions/api/sync_file_system/sync_file_system_api.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 
@@ skipping 353 matching lines @@
       api::sync_file_system::ParseConflictResolutionPolicy(policy_string));
   if (policy != sync_file_system::CONFLICT_RESOLUTION_POLICY_LAST_WRITE_WIN) {
     return RespondNow(Error(base::StringPrintf(
         kUnsupportedConflictResolutionPolicy, policy_string.c_str())));
   }
   return RespondNow(NoArguments());
 }
 
 ExtensionFunction::ResponseAction
 SyncFileSystemGetConflictResolutionPolicyFunction::Run() {
-  return RespondNow(OneArgument(
-      base::MakeUnique<base::StringValue>(api::sync_file_system::ToString(
+  return RespondNow(
+      OneArgument(base::MakeUnique<base::Value>(api::sync_file_system::ToString(
           api::sync_file_system::CONFLICT_RESOLUTION_POLICY_LAST_WRITE_WIN))));
 }
 
 ExtensionFunction::ResponseAction
 SyncFileSystemGetServiceStatusFunction::Run() {
   sync_file_system::SyncFileSystemService* service =
       GetSyncFileSystemService(browser_context());
   if (!service)
     return RespondNow(Error(kUnknownErrorDoNotUse));
   return RespondNow(
       ArgumentList(api::sync_file_system::GetServiceStatus::Results::Create(
           SyncServiceStateToExtensionEnum(service->GetSyncServiceState()))));
 }
 
 }  // namespace extensions