Changing SpawnChild to return a struct.

services/service_manager/runner/host/service_process_launcher.cc

Index: services/service_manager/runner/host/service_process_launcher.cc
diff --git a/services/service_manager/runner/host/service_process_launcher.cc b/services/service_manager/runner/host/service_process_launcher.cc
index 759df0064814165287a42b46f70b62aec30cc127..1ade9c6cf29b6db81001e6eb83c966793413a37b 100644
--- a/services/service_manager/runner/host/service_process_launcher.cc
+++ b/services/service_manager/runner/host/service_process_launcher.cc
@@ -196,8 +196,9 @@ void ServiceProcessLauncher::DoLaunch(
 
     if (mojo_ipc_channel_.get()) {
       mojo_ipc_channel_->ChildProcessLaunched();
-      process_connection_.Connect(child_process_.Handle(),
-                                  mojo_ipc_channel_->PassServerHandle());
+      process_connection_.Connect(
+          child_process_.Handle(),
+          mojo::edk::ConnectionParam(mojo_ipc_channel_->PassServerHandle()));
     }
   }
   start_child_process_event_.Signal();