Import Cobalt 19.master.0.205881
diff --git a/src/base/strings/string16_unittest.nc b/src/base/strings/string16_unittest.nc
new file mode 100644
index 0000000..5186a45
--- /dev/null
+++ b/src/base/strings/string16_unittest.nc
@@ -0,0 +1,25 @@
+// Copyright 2017 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.
+
+// This is a "No Compile Test".
+// http://dev.chromium.org/developers/testing/no-compile-tests
+
+#include "base/strings/string16.h"
+
+#if defined(NCTEST_NO_KOENIG_LOOKUP_FOR_STRING16) // [r"use of undeclared identifier 'ShouldNotBeFound'"]
+
+// base::string16 is declared as a typedef. It should not cause other functions
+// in base to be found via Argument-dependent lookup.
+
+namespace base {
+void ShouldNotBeFound(const base::string16& arg) {}
+}
+
+// Intentionally not in base:: namespace.
+void WontCompile() {
+ base::string16 s;
+ ShouldNotBeFound(s);
+}
+
+#endif
