Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/tools/profile_reset/jtl_compiler_frontend.cc

 // Copyright 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.
 //
 // A simple command-line compiler for JTL (JSON Traversal Language).
 //
 // Translates rules from a text-based, human-readable format to an easy-to-parse
 // byte-code format, which then can be interpreted by JtlInterpreter.
 //
 // Example usage:
@@ skipping 82 matching lines @@
     std::cerr << "  Line number: " << (error.line_number + 1) << std::endl;
     std::cerr << "  Context: " << (error.context.size() > 63
                                        ? error.context.substr(0, 60) + "..."
                                        : error.context) << std::endl;
     return -2;
   }
 
   base::FilePath bytecode_path =
       MakeAbsoluteFilePath(cmd_line->GetSwitchValuePath(kOutputPath));
   int bytes_written =
-      file_util::WriteFile(cmd_line->GetSwitchValuePath(kOutputPath),
+      base::WriteFile(cmd_line->GetSwitchValuePath(kOutputPath),
                            bytecode.data(),
                            static_cast<int>(bytecode.size()));
   if (bytes_written != static_cast<int>(bytecode.size())) {
     std::cerr << "ERROR: Cannot write output file." << std::endl;
     return -3;
   }
 
   return 0;
 }