Move WriteFile and WriteFileDescriptor from file_util to base namespace.

chrome/service/cloud_print/connector_settings_unittest.cc

Index: chrome/service/cloud_print/connector_settings_unittest.cc
diff --git a/chrome/service/cloud_print/connector_settings_unittest.cc b/chrome/service/cloud_print/connector_settings_unittest.cc
index 66451502033f491a4055e35c5c5efad4fb683afb..07f4717a31702b12a407ab96de7ad99db314b173 100644
--- a/chrome/service/cloud_print/connector_settings_unittest.cc
+++ b/chrome/service/cloud_print/connector_settings_unittest.cc
@@ -60,7 +60,7 @@ class ConnectorSettingsTest : public testing::Test {
     if (json) {
       std::string content = json;
       std::replace(content.begin(), content.end(), '\'', '"');
-      file_util::WriteFile(file_name, content.c_str(), content.size());
+      base::WriteFile(file_name, content.c_str(), content.size());
     }
     ServiceProcessPrefs* prefs =
         new ServiceProcessPrefs(file_name, message_loop_proxy_.get());