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

extensions/test/service_registration_manager_test_api.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_SERVICE_REGISTRATION_MANAGER_TEST_API_H_
+#define EXTENSIONS_TEST_SERVICE_REGISTRATION_MANAGER_TEST_API_H_
+
+#include "extensions/browser/service_registration_manager.h"
+
+#include <map>
+#include <string>
+
+namespace extensions {
+namespace internal {
+
+class TestServiceRegistrationManager : public ServiceRegistrationManager {
+ public:
+  TestServiceRegistrationManager();
+  ~TestServiceRegistrationManager();
+
+  // 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) {
+    bool inserted =
+        test_factories_.insert(std::make_pair(
+                                   Interface::Name_,
+                                   linked_ptr<internal::ServiceFactoryBase>(
+                                       new internal::ServiceFactory<Interface>(
+                                           factory)))).second;

[raymes, 2014/10/24 00:09:30]

Please break this up a bit to reduce the indenting.

[Sam McNally, 2014/10/24 03:55:56]

Done.

+    DCHECK(inserted);
+  }
+
+  virtual void AddServiceToServiceRegistry(
+      content::ServiceRegistry* service_registry,
+      ServiceFactoryBase* service_factory) override;
+
+ private:
+  std::map<std::string, linked_ptr<ServiceFactoryBase>> test_factories_;
+
+  ServiceRegistrationManager* service_registration_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestServiceRegistrationManager);
+};
+
+}  // namespace internal
+
+class ServiceRegistrationManagerTestApi {

[raymes, 2014/10/24 00:09:30]

Why not just expose TestServiceRegistrationManager directly and call
SetServiceRegstrationManagerForTest from inside the test?

[Sam McNally, 2014/10/24 03:55:56]

ServiceRegistrationManager isn't really part of the testing interface - only
OverrideServiceFactoryForTest is.

[raymes, 2014/10/27 00:11:46]

As discussed, let's get rid of this class and just expose the above directly :)

[Sam McNally, 2014/10/27 06:56:25]

Done.

+ public:
+  ServiceRegistrationManagerTestApi();
+  ~ServiceRegistrationManagerTestApi();
+
+  // 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) {
+    service_registration_manager_.OverrideServiceFactoryForTest(factory);
+  }
+
+ private:
+  internal::TestServiceRegistrationManager service_registration_manager_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceRegistrationManagerTestApi);
+};
+
+}  // namespace extensions
+
+#endif  // EXTENSIONS_TEST_SERVICE_REGISTRATION_MANAGER_TEST_API_H_