Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

base/test/test_launcher.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.
 
 #include "base/test/test_launcher.h"
 
 #include "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/environment.h"
@@ skipping 144 matching lines @@
     // (the behavior is same as what gtest does).
     if (path.EndsWithSeparator()) {
       FilePath executable = command_line.GetProgram().BaseName();
       path = path.Append(executable.ReplaceExtension(
           FilePath::StringType(FILE_PATH_LITERAL("xml"))));
     }
   }
   if (path.value().empty())
     path = FilePath(kDefaultOutputFile);
   FilePath dir_name = path.DirName();
-  if (!file_util::DirectoryExists(dir_name)) {
+  if (!DirectoryExists(dir_name)) {
     LOG(WARNING) << "The output directory does not exist. "
                  << "Creating the directory: " << dir_name.value();
     // Create the directory if necessary (because the gtest does the same).
     file_util::CreateDirectory(dir_name);
   }
   out_ = file_util::OpenFile(path, "w");
   if (!out_) {
     LOG(ERROR) << "Cannot open output file: "
                << path.value() << ".";
     return;
@@ skipping 265 matching lines @@
 
     // Special value "-1" means "repeat indefinitely".
     if (cycles != -1)
       cycles--;
   }
 
   return exit_code;
 }
 
 }  // namespace base