Mojo C++ bindings: support mapping mojo string to WTF::String.

mojo/public/cpp/bindings/tests/wtf_test_base.h

+// Copyright 2016 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.
+
+#ifndef MOJO_PUBLIC_CPP_BINDINGS_TESTS_WTF_TEST_BASE_H_
+#define MOJO_PUBLIC_CPP_BINDINGS_TESTS_WTF_TEST_BASE_H_
+
+#include "base/macros.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace mojo {
+namespace test {
+
+class WTFTestBase : public testing::Test {
+ public:
+  ~WTFTestBase() override;
+
+ protected:
+  WTFTestBase();
+
+  // testing::Test overrides:
+  void SetUp() override;
+
+  DISALLOW_COPY_AND_ASSIGN(WTFTestBase);
+};
+
+}  // namespace test
+}  // namespace mojo
+
+#endif  // MOJO_PUBLIC_CPP_BINDINGS_TESTS_WTF_TEST_BASE_H_