Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/tools/convert_dict/convert_dict_unittest.cc

Index: chrome/tools/convert_dict/convert_dict_unittest.cc
diff --git a/chrome/tools/convert_dict/convert_dict_unittest.cc b/chrome/tools/convert_dict/convert_dict_unittest.cc
index cbb92ac1fa5e99f1905afcf3a81b19d75fe7f37b..eb7ed65446346d949b102b407129d5f1ae2c728a 100644
--- a/chrome/tools/convert_dict/convert_dict_unittest.cc
+++ b/chrome/tools/convert_dict/convert_dict_unittest.cc
@@ -81,11 +81,11 @@ void RunDictionaryTest(const char* codepage,
   // Create a temporary affix file and a dictionary file from the test data.
   base::FilePath aff_file;
   base::CreateTemporaryFile(&aff_file);
-  file_util::WriteFile(aff_file, aff_data.c_str(), aff_data.length());
+  base::WriteFile(aff_file, aff_data.c_str(), aff_data.length());
 
   base::FilePath dic_file;
   base::CreateTemporaryFile(&dic_file);
-  file_util::WriteFile(dic_file, dic_data.c_str(), dic_data.length());
+  base::WriteFile(dic_file, dic_data.c_str(), dic_data.length());
 
   {
     // Read the above affix file with AffReader and read the dictionary file