Moved GetCurrentUserName to service_utils.*

cloud_print/service/win/service_utils.cc

+// Copyright (c) 2012 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 "cloud_print/service/win/service_utils.h"
+
+#include <windows.h>
+#include <security.h>  // NOLINT
+
+string16 GetCurrentUserName() {
+  ULONG size = 0;
+  string16 result;
+  ::GetUserNameEx(::NameSamCompatible, NULL, &size);
+  result.resize(size);
+  if (result.empty())
+    return result;
+  if (!::GetUserNameEx(::NameSamCompatible, &result[0], &size))
+    result.clear();
+  result.resize(size);
+  return result;
+}
+
+