Move shell service to toplevel shell namespace

components/mus/public/cpp/tests/window_server_test_base.cc

Index: components/mus/public/cpp/tests/window_server_test_base.cc
diff --git a/components/mus/public/cpp/tests/window_server_test_base.cc b/components/mus/public/cpp/tests/window_server_test_base.cc
index 1cc440c047f8b95db21b0514cbbc2763b3d71583..90e973893cfc78c58b9279bffd7e9cc8aa2dfa1d 100644
--- a/components/mus/public/cpp/tests/window_server_test_base.cc
+++ b/components/mus/public/cpp/tests/window_server_test_base.cc
@@ -71,7 +71,7 @@ void WindowServerTestBase::SetUp() {
   std::swap(window_manager_, most_recent_connection_);
 }
 
-bool WindowServerTestBase::AcceptConnection(mojo::Connection* connection) {
+bool WindowServerTestBase::AcceptConnection(shell::Connection* connection) {
   connection->AddInterface<mojom::WindowTreeClient>(this);
   return true;
 }
@@ -119,7 +119,7 @@ void WindowServerTestBase::OnAccelerator(uint32_t id, const ui::Event& event) {
 }
 
 void WindowServerTestBase::Create(
-    mojo::Connection* connection,
+    shell::Connection* connection,
     mojo::InterfaceRequest<mojom::WindowTreeClient> request) {
   WindowTreeConnection::Create(
       this, std::move(request),