Move ReadFileToString to the base namespace.

chrome/browser/policy/policy_prefs_browsertest.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 <algorithm>
 #include <map>
 #include <sstream>
 #include <string>
 #include <vector>
 
@@ skipping 179 matching lines @@
   typedef std::map<std::string, PolicyTestCase*> PolicyTestCaseMap;
   typedef PolicyTestCaseMap::const_iterator iterator;
 
   PolicyTestCases() {
     policy_test_cases_ = new std::map<std::string, PolicyTestCase*>();
 
     base::FilePath path = ui_test_utils::GetTestFilePath(
         base::FilePath(FILE_PATH_LITERAL("policy")),
         base::FilePath(FILE_PATH_LITERAL("policy_test_cases.json")));
     std::string json;
-    if (!file_util::ReadFileToString(path, &json)) {
+    if (!base::ReadFileToString(path, &json)) {
       ADD_FAILURE();
       return;
     }
     int error_code = -1;
     std::string error_string;
     base::DictionaryValue* dict = NULL;
     scoped_ptr<base::Value> value(base::JSONReader::ReadAndReturnError(
         json, base::JSON_PARSE_RFC, &error_code, &error_string));
     if (!value.get() || !value->GetAsDictionary(&dict)) {
       ADD_FAILURE() << "Error parsing policy_test_cases.json: " << error_string;
@@ skipping 355 matching lines @@
   }
 }
 
 INSTANTIATE_TEST_CASE_P(
     PolicyPrefsTestInstance,
     PolicyPrefsTest,
     testing::ValuesIn(GetChromePolicyDefinitionList()->begin,
                       GetChromePolicyDefinitionList()->end));
 
 }  // namespace policy