Move ReadFileToString to the base namespace.

chrome/browser/ssl/ssl_browser_tests.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/command_line.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 651 matching lines @@
   // Open a temporary NSS DB for testing.
   crypto::ScopedTestNSSDB test_nssdb;
   ASSERT_TRUE(test_nssdb.is_open());
 
   // Import client cert for test. These interfaces require NSS.
   net::NSSCertDatabase* cert_db = net::NSSCertDatabase::GetInstance();
   scoped_refptr<net::CryptoModule> crypt_module = cert_db->GetPublicModule();
   std::string pkcs12_data;
   base::FilePath cert_path = net::GetTestCertsDirectory().Append(
       FILE_PATH_LITERAL("websocket_client_cert.p12"));
-  EXPECT_TRUE(file_util::ReadFileToString(cert_path, &pkcs12_data));
+  EXPECT_TRUE(base::ReadFileToString(cert_path, &pkcs12_data));
   EXPECT_EQ(net::OK,
             cert_db->ImportFromPKCS12(
                 crypt_module.get(), pkcs12_data, string16(), true, NULL));
 
   // Start WebSocket test server with TLS and client cert authentication.
   net::SpawnedTestServer::SSLOptions options(
       net::SpawnedTestServer::SSLOptions::CERT_OK);
   options.request_client_certificate = true;
   base::FilePath ca_path = net::GetTestCertsDirectory().Append(
       FILE_PATH_LITERAL("websocket_cacert.pem"));
@@ skipping 960 matching lines @@
 
 // Visit a page over https that contains a frame with a redirect.
 
 // XMLHttpRequest insecure content in synchronous mode.
 
 // XMLHttpRequest insecure content in asynchronous mode.
 
 // XMLHttpRequest over bad ssl in synchronous mode.
 
 // XMLHttpRequest over OK ssl in synchronous mode.