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

services/service_manager/public/cpp/lib/service_context.cc

Index: services/service_manager/public/cpp/lib/service_context.cc
diff --git a/services/service_manager/public/cpp/lib/service_context.cc b/services/service_manager/public/cpp/lib/service_context.cc
index d95d60629ee2e696867663b376e565222be35edf..d2997a67cecb196075c617a570d90840b085cb55 100644
--- a/services/service_manager/public/cpp/lib/service_context.cc
+++ b/services/service_manager/public/cpp/lib/service_context.cc
@@ -81,7 +81,9 @@ void ServiceContext::OnStart(const ServiceInfo& info,
   local_info_ = info;
   callback.Run(std::move(pending_connector_request_),
                mojo::GetProxy(&service_control_, binding_.associated_group()));
-  service_->OnStart(this);
+
+  service_->set_context(this);
+  service_->OnStart();
 }
 
 void ServiceContext::OnConnect(