Make browser process a singleton service

content/public/common/service_names.mojom

 // 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.
 
 module content.mojom;
 
 // The default service name the browser identifies as when connecting to
 // the Service Manager. This must match the name in
 // src/content/public/app/mojo/content_browser_manifest.json.
 const string kBrowserServiceName = "content_browser";
 
 // The default service name used to identify the gpu process when connecting it
 // to the Service Manager. This must match the name in
 // src/content/public/app/mojo/content_gpu_manifest.json.
 const string kGpuServiceName = "content_gpu";
 
+// The service name used to identify the browser process's singleton service
+// instance which packages other browser-wide services. this must match the name
+// in src/content/public/app/mojo/content_packaged_services_manifest.json.
+const string kPackagedServicesServiceName = "content_packaged_services";
+
 // The default service name used to identify plugin processes when connecting
 // them to the Service Manager. This must match the name in
 // src/content/public/app/mojo/content_plugin_manifest.json.
 const string kPluginServiceName = "content_plugin";
 
 // The default service name used to identify render processes when connecting
 // them to the Service Manager. This must match the name in
 // src/content/public/app/mojo/content_renderer_manifest.json.
 const string kRendererServiceName = "content_renderer";
 
 // The default service name used to identify utility processes when connecting
 // them to the Service Manager. This must match the name in
 // src/content/public/app/mojo/content_utility_manifest.json.
 const string kUtilityServiceName = "content_utility";