Move ReadFileToString to the base namespace.

chrome/browser/chromeos/login/kiosk_browsertest.cc

 // Copyright (c) 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 "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 163 matching lines @@
 
     std::string test_gallery_download_url = test_gallery_url;
     test_gallery_download_url.append("/downloads/%s.crx");
     command_line->AppendSwitchASCII(
         ::switches::kAppsGalleryDownloadURL, test_gallery_download_url);
   }
 
   virtual void SetUpInProcessBrowserTestFixture() OVERRIDE {
     base::FilePath test_data_dir;
     PathService::Get(chrome::DIR_TEST_DATA, &test_data_dir);
-    CHECK(file_util::ReadFileToString(test_data_dir.Append(kServiceLogin),
-                                      &service_login_response_));
+    CHECK(base::ReadFileToString(test_data_dir.Append(kServiceLogin),
+                                 &service_login_response_));
 
     host_resolver()->AddRule(kWebstoreDomain, "127.0.0.1");
   }
 
   void ReloadKioskApps() {
     KioskAppManager::Get()->AddApp(kTestKioskApp);
   }
 
   void ReloadAutolaunchKioskApps() {
     KioskAppManager::Get()->AddApp(kTestKioskApp);
@@ skipping 220 matching lines @@
   content::WindowedNotificationObserver(
       chrome::NOTIFICATION_KIOSK_ENABLED,
       content::NotificationService::AllSources()).Wait();
   EXPECT_EQ(KioskAppManager::CONSUMER_KIOSK_MODE_ENABLED,
             GetConsumerKioskModeStatus());
 }
 
 INSTANTIATE_TEST_CASE_P(KioskTestInstantiation, KioskTest, testing::Bool());
 
 }  // namespace chromeos