Replace remaining shell references with service manager

services/service_manager/public/cpp/service_test.h

Index: services/service_manager/public/cpp/service_test.h
diff --git a/services/service_manager/public/cpp/service_test.h b/services/service_manager/public/cpp/service_test.h
index 7ef568b9d5117fce1317295cb02f2418496f4df1..d46229f54a480e805384eba67016b9a853a7ab1b 100644
--- a/services/service_manager/public/cpp/service_test.h
+++ b/services/service_manager/public/cpp/service_test.h
@@ -19,7 +19,7 @@ class MessageLoop;
 
 namespace service_manager {
 
-class BackgroundShell;
+class BackgroundServiceManager;
 
 namespace test {
 
@@ -87,7 +87,7 @@ class ServiceTest : public testing::Test {
   std::unique_ptr<Service> service_;
 
   std::unique_ptr<base::MessageLoop> message_loop_;
-  std::unique_ptr<BackgroundShell> background_shell_;
+  std::unique_ptr<BackgroundServiceManager> background_service_manager_;
   std::unique_ptr<ServiceContext> service_context_;
 
   // See constructor.