Move ReadFileToString to the base namespace.

chromeos/network/onc/onc_test_utils.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 "chromeos/network/onc/onc_test_utils.h"
 
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/json/json_file_value_serializer.h"
 #include "base/logging.h"
@@ skipping 15 matching lines @@
 std::string ReadTestData(const std::string& filename) {
   base::FilePath path;
   if (!chromeos::test_utils::GetTestDataPath(kNetworkComponentDirectory,
                                              filename,
                                              &path)) {
     NOTREACHED() << "Unable to get test data path for "
                  << kNetworkComponentDirectory << "/" << filename;
     return "";
   }
   std::string result;
-  file_util::ReadFileToString(path, &result);
+  base::ReadFileToString(path, &result);
   return result;
 }
 
 scoped_ptr<base::DictionaryValue> ReadTestDictionary(
     const std::string& filename) {
   base::DictionaryValue* dict = NULL;
   base::FilePath path;
   if (!chromeos::test_utils::GetTestDataPath(kNetworkComponentDirectory,
                                              filename,
                                              &path)) {
@@ skipping 27 matching lines @@
     return ::testing::AssertionSuccess() << "Values are equal";
 
   return ::testing::AssertionFailure() << "Values are unequal.\n"
                                        << "Expected value:\n" << *expected
                                        << "Actual value:\n" << *actual;
 }
 
 }  // namespace test_utils
 }  // namespace onc
 }  // namespace chromeos