Add support to the UI Service to run it inside the browser's process.

services/ui/main.cc

Index: services/ui/main.cc
diff --git a/services/ui/main.cc b/services/ui/main.cc
index faf37799ca314acce67a8a9e3f752ed51fa3bdae..c921c0cef7d481033cb997f14b1ccd3b32c9e228 100644
--- a/services/ui/main.cc
+++ b/services/ui/main.cc
@@ -8,7 +8,7 @@
 #include "services/ui/service.h"
 
 MojoResult ServiceMain(MojoHandle service_request_handle) {
-  service_manager::ServiceRunner runner(new ui::Service);
+  service_manager::ServiceRunner runner(new ui::Service(nullptr));
   runner.set_message_loop_type(base::MessageLoop::TYPE_UI);
   return runner.Run(service_request_handle);
 }