Remove extensions::ServiceRegistrationManager.

extensions/browser/api/serial/serial_service_factory.cc

+// Copyright 2015 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/browser/api/serial/serial_service_factory.h"
+
+#include "content/public/browser/browser_thread.h"
+#include "device/serial/serial_service_impl.h"
+
+namespace extensions {
+namespace {
+const base::Callback<void(
+    mojo::InterfaceRequest<device::serial::SerialService>)>*
+    g_serial_service_test_factory = nullptr;
+}
+
+void BindToSerialServiceRequest(
+    mojo::InterfaceRequest<device::serial::SerialService> request) {
+  if (g_serial_service_test_factory) {
+    g_serial_service_test_factory->Run(request.Pass());
+    return;
+  }
+  device::SerialServiceImpl::CreateOnMessageLoop(
+      content::BrowserThread::GetMessageLoopProxyForThread(
+          content::BrowserThread::FILE),
+      content::BrowserThread::GetMessageLoopProxyForThread(
+          content::BrowserThread::IO),
+      content::BrowserThread::GetMessageLoopProxyForThread(
+          content::BrowserThread::UI),
+      request.Pass());
+}
+
+void SetSerialServiceFactoryForTest(const base::Callback<
+    void(mojo::InterfaceRequest<device::serial::SerialService>)>* callback) {
+  g_serial_service_test_factory = callback;
+}
+
+}  // namespace extensions