Revert of [Service Manager] Get rid of dynamic service discovery

ui/views/mus/interactive_ui_tests_mus.cc

Index: ui/views/mus/interactive_ui_tests_mus.cc
diff --git a/ui/views/mus/interactive_ui_tests_mus.cc b/ui/views/mus/interactive_ui_tests_mus.cc
index 5bea8092bb4c7c48c2757fbe38bf828970c092ce..4181166def3b2ba59638842f27ffadd23d1071d5 100644
--- a/ui/views/mus/interactive_ui_tests_mus.cc
+++ b/ui/views/mus/interactive_ui_tests_mus.cc
@@ -4,6 +4,6 @@
 
 #include "ui/views/mus/views_mus_test_suite.h"
 
-int main(int argc, char** argv) {
+int MasterProcessMain(int argc, char** argv) {
   return views::ViewsMusTestSuite(argc, argv).RunTestsSerially();
 }