Make Service own ServiceContext.

services/shell/public/interfaces/service_manager.mojom

 // 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.
 
 module shell.mojom;
 
 import "services/shell/public/interfaces/connector.mojom";
 
 struct ServiceInfo {
   uint32 id;
@@ skipping 10 matching lines @@
   OnInit(array<ServiceInfo> running_services);
 
   // Called when the Service Manager has started tracking a Service. This
   // happens when the Service Manager first handles a request to launch the
   // Service, before a process is created for it.
   OnServiceCreated(ServiceInfo service);
 
   // Called when a pid is available for the service. This could be because the
   // Service Manager created a process for it, or because an existing one was
   // assigned to it.
-  OnServiceStarted(uint32 id, uint32 pid);
+  OnServiceStarted(Identity identity, uint32 pid);
 
   // Called when the Service Manager has stopped tracking a service. (i.e. when
   // it has ended/quit).
-  OnServiceStopped(uint32 id);
+  OnServiceStopped(Identity identity);
 };
 
 interface ServiceManager {
   // The listener is removed when the |listener| pipe is closed.
   AddListener(ServiceManagerListener listener);
 };