Revert of Service Manager: Remove ServiceContext* arg from Service::OnStart()

services/service_manager/tests/shutdown/shutdown_client_app.cc

Index: services/service_manager/tests/shutdown/shutdown_client_app.cc
diff --git a/services/service_manager/tests/shutdown/shutdown_client_app.cc b/services/service_manager/tests/shutdown/shutdown_client_app.cc
index b91e8f686f37cfb2a80ec42652cb626080a660b4..bc222d6f8977030a9a7faed056bf3cf7221f70cc 100644
--- a/services/service_manager/tests/shutdown/shutdown_client_app.cc
+++ b/services/service_manager/tests/shutdown/shutdown_client_app.cc
@@ -27,6 +27,10 @@
 
  private:
   // service_manager::Service:
+  void OnStart(ServiceContext* context) override {
+    context_ = context;
+  }
+
   bool OnConnect(const ServiceInfo& remote_info,
                  InterfaceRegistry* registry) override {
     registry->AddInterface<mojom::ShutdownTestClientController>(this);
@@ -42,7 +46,7 @@
   // mojom::ShutdownTestClientController:
   void ConnectAndWait(const ConnectAndWaitCallback& callback) override {
     mojom::ShutdownTestServicePtr service;
-    context()->connector()->ConnectToInterface(
+    context_->connector()->ConnectToInterface(
         "service:shutdown_service", &service);
 
     mojo::Binding<mojom::ShutdownTestClient> client_binding(this);
@@ -61,6 +65,7 @@
     callback.Run();
   }
 
+  ServiceContext* context_ = nullptr;
   mojo::BindingSet<mojom::ShutdownTestClientController> bindings_;
 
   DISALLOW_COPY_AND_ASSIGN(ShutdownClientApp);