Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/tools/profile_reset/jtl_compiler_frontend.cc

Index: chrome/tools/profile_reset/jtl_compiler_frontend.cc
diff --git a/chrome/tools/profile_reset/jtl_compiler_frontend.cc b/chrome/tools/profile_reset/jtl_compiler_frontend.cc
index abc194464c5047997ff8956db0b4cf2eb39d70b3..b17220547ec4c8d7f6ed9426e368a727e4a9f36c 100644
--- a/chrome/tools/profile_reset/jtl_compiler_frontend.cc
+++ b/chrome/tools/profile_reset/jtl_compiler_frontend.cc
@@ -100,7 +100,7 @@ int main(int argc, char* argv[]) {
   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())) {