Move shell service to toplevel shell namespace

ui/views/mus/aura_init.cc

Index: ui/views/mus/aura_init.cc
diff --git a/ui/views/mus/aura_init.cc b/ui/views/mus/aura_init.cc
index 6a98706676ca76593e528db6315f80ae334f80b7..0b44e720385ffab2c18bffb0f32084973fa0f2c8 100644
--- a/ui/views/mus/aura_init.cc
+++ b/ui/views/mus/aura_init.cc
@@ -50,7 +50,8 @@ class MusViewsDelegate : public ViewsDelegate {
 
 }  // namespace
 
-AuraInit::AuraInit(mojo::Connector* connector, const std::string& resource_file)
+AuraInit::AuraInit(shell::Connector* connector,
+                   const std::string& resource_file)
     : resource_file_(resource_file),
       env_(aura::Env::CreateInstance()),
       views_delegate_(new MusViewsDelegate) {
@@ -71,7 +72,7 @@ AuraInit::~AuraInit() {
 #endif
 }
 
-void AuraInit::InitializeResources(mojo::Connector* connector) {
+void AuraInit::InitializeResources(shell::Connector* connector) {
   if (ui::ResourceBundle::HasSharedInstance())
     return;
   resource_provider::ResourceLoader resource_loader(