Add support for writing unit tests for Mojo-backed apps/extensions APIs.

extensions/renderer/api_test_base_unittest.cc

+// Copyright 2014 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 "extensions/renderer/api_test_base.h"
+
+namespace extensions {
+
+class ApiTestBaseTest : public ApiTestBase {
+ public:
+  virtual void SetUp() OVERRIDE { ApiTestBase::SetUp(); }
+};
+
+TEST_F(ApiTestBaseTest, TestEnvironment) {
+  RunTest("api_test_base_unittest.js", "testEnvironment");
+}
+
+TEST_F(ApiTestBaseTest, TestPromisesRun) {
+  RunTest("api_test_base_unittest.js", "testPromisesRun");
+}
+
+TEST_F(ApiTestBaseTest, TestCommonModulesAreAvailable) {
+  RunTest("api_test_base_unittest.js", "testCommonModulesAreAvailable");
+}
+
+TEST_F(ApiTestBaseTest, TestMojoModulesAreAvailable) {
+  RunTest("api_test_base_unittest.js", "testMojoModulesAreAvailable");
+}
+
+}  // namespace extensions