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

mash/example/window_type_launcher/window_type_launcher.h

Index: mash/example/window_type_launcher/window_type_launcher.h
diff --git a/mash/example/window_type_launcher/window_type_launcher.h b/mash/example/window_type_launcher/window_type_launcher.h
index b1663a68e40052fd5ab0c4dfbad535a39a18047a..bee66f16f8797616e30d9df937bad77d2431cb15 100644
--- a/mash/example/window_type_launcher/window_type_launcher.h
+++ b/mash/example/window_type_launcher/window_type_launcher.h
@@ -13,10 +13,6 @@
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/service.h"
 
-namespace service_manager {
-class ServiceContext;
-}
-
 namespace views {
 class AuraInit;
 class Widget;
@@ -34,7 +30,7 @@ class WindowTypeLauncher
 
  private:
   // service_manager::Service:
-  void OnStart(service_manager::ServiceContext* context) override;
+  void OnStart() override;
   bool OnConnect(const service_manager::ServiceInfo& remote_info,
                  service_manager::InterfaceRegistry* registry) override;
 
@@ -45,8 +41,6 @@ class WindowTypeLauncher
   void Create(const service_manager::Identity& remote_identity,
               mash::mojom::LaunchableRequest request) override;
 
-  service_manager::ServiceContext* context_ = nullptr;
-
   mojo::BindingSet<mash::mojom::Launchable> bindings_;
   std::vector<views::Widget*> windows_;