Enable the mojo-based serial API in the renderer behind a flag.

extensions/test/test_service_registration_manager.h

+// 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.
+
+#ifndef EXTENSIONS_TEST_TEST_SERVICE_REGISTRATION_MANAGER_H_
+#define EXTENSIONS_TEST_TEST_SERVICE_REGISTRATION_MANAGER_H_
+
+#include <map>
+#include <string>
+
+#include "extensions/browser/mojo/service_registration_manager.h"
+
+namespace extensions {
+
+class TestServiceRegistrationManager : public ServiceRegistrationManager {
+ public:
+  TestServiceRegistrationManager();
+  ~TestServiceRegistrationManager() override;
+
+  // Overrides an existing service factory with |factory| for testing. This
+  // does not alter the permission checks used to determine whether a service
+  // is available.
+  template <typename Interface>
+  void OverrideServiceFactoryForTest(
+      const base::Callback<void(mojo::InterfaceRequest<Interface>)>& factory) {
+    linked_ptr<internal::ServiceFactoryBase> service_factory(
+        new internal::ServiceFactory<Interface>(factory));
+    auto result = test_factories_.insert(
+        std::make_pair(Interface::Name_, service_factory));
+    DCHECK(result.second);
+  }
+
+  void AddServiceToServiceRegistry(
+      content::ServiceRegistry* service_registry,
+      internal::ServiceFactoryBase* service_factory) override;
+
+ private:
+  std::map<std::string, linked_ptr<internal::ServiceFactoryBase>>
+      test_factories_;
+
+  ServiceRegistrationManager* service_registration_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestServiceRegistrationManager);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_TEST_TEST_SERVICE_REGISTRATION_MANAGER_H_