Move ReadFileToString to the base namespace.

chromeos/system/name_value_pairs_parser.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/system/name_value_pairs_parser.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
@@ skipping 105 matching lines @@
   TrimWhitespaceASCII(output_string, TRIM_ALL, &output_string);
   AddNameValuePair(key, output_string);
   return true;
 }
 
 bool NameValuePairsParser::GetNameValuePairsFromFile(
     const base::FilePath& file_path,
     const std::string& eq,
     const std::string& delim) {
   std::string contents;
-  if (file_util::ReadFileToString(file_path, &contents)) {
+  if (base::ReadFileToString(file_path, &contents)) {
     return ParseNameValuePairs(contents, eq, delim);
   } else {
     LOG(WARNING) << "Unable to read statistics file: " << file_path.value();
     return false;
   }
 }
 
 bool NameValuePairsParser::ParseNameValuePairsFromTool(
     int argc,
     const char* argv[],
     const std::string& eq,
     const std::string& delim,
     const std::string& comment_delim) {
   std::string output_string;
   if (!GetToolOutput(argc, argv, output_string))
     return false;
 
   return ParseNameValuePairsWithComments(
       output_string, eq, delim, comment_delim);
 }
 
 }  // namespace system
 }  // namespace chromeos