Remove base::Value::CreateNullValue

chrome/browser/chromeos/extensions/file_manager/private_api_misc.cc

 // Copyright 2013 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/chromeos/extensions/file_manager/private_api_misc.h"
 
 #include <stddef.h>
 
 #include <set>
 #include <vector>
@@ skipping 318 matching lines @@
   net::URLRequestContextGetter* url_request_context_getter =
       g_browser_process->system_request_context();
 
   if (!oauth_service) {
     drive::EventLogger* logger = file_manager::util::GetLogger(GetProfile());
     if (logger) {
       logger->Log(logging::LOG_ERROR,
                   "CWS OAuth token fetch failed. OAuth2TokenService can't "
                   "be retrieved.");
     }
-    SetResult(base::Value::CreateNullValue());
+    SetResult(base::MakeUnique<base::Value>());
     return false;
   }
 
   SigninManagerBase* signin_manager =
       SigninManagerFactory::GetForProfile(GetProfile());
   auth_service_.reset(new google_apis::AuthService(
       oauth_service,
       signin_manager->GetAuthenticatedAccountId(),
       url_request_context_getter,
       scopes));
@@ skipping 16 matching lines @@
     if (logger)
       logger->Log(logging::LOG_INFO, "CWS OAuth token fetch succeeded.");
     SetResult(base::MakeUnique<base::Value>(access_token));
     SendResponse(true);
   } else {
     if (logger) {
       logger->Log(logging::LOG_ERROR,
                   "CWS OAuth token fetch failed. (DriveApiErrorCode: %s)",
                   google_apis::DriveApiErrorCodeToString(code).c_str());
     }
-    SetResult(base::Value::CreateNullValue());
+    SetResult(base::MakeUnique<base::Value>());
     SendResponse(false);
   }
 }
 
 ExtensionFunction::ResponseAction FileManagerPrivateGetProfilesFunction::Run() {
   const std::vector<ProfileInfo>& profiles = GetLoggedInProfileInfoList();
 
   // Obtains the display profile ID.
   AppWindow* const app_window = GetCurrentAppWindow(this);
   chrome::MultiUserWindowManager* const window_manager =
@@ skipping 305 matching lines @@
     base::File::Error result) {
   if (result != base::File::FILE_OK) {
     Respond(Error("Failed to execute the action."));
     return;
   }
 
   Respond(NoArguments());
 }
 
 }  // namespace extensions