Add a user id parameter to connections

ash/mus/sysui_application.cc

Index: ash/mus/sysui_application.cc
diff --git a/ash/mus/sysui_application.cc b/ash/mus/sysui_application.cc
index d5e008cd74f32ee9451648bd17444ebf790b3338..739242dc7b0ff48c01dbf7b10688f0e98b759e19 100644
--- a/ash/mus/sysui_application.cc
+++ b/ash/mus/sysui_application.cc
@@ -256,7 +256,8 @@ SysUIApplication::~SysUIApplication() {}
 
 void SysUIApplication::Initialize(mojo::Shell* shell,
                                   const std::string& url,
-                                  uint32_t id) {
+                                  uint32_t id,
+                                  uint32_t user_id) {
   ash_init_.reset(new AshInit());
   ash_init_->Initialize(shell);
 }