Changes container names and adds a couple of more

mash/wm/window_manager.cc

Index: mash/wm/window_manager.cc
diff --git a/mash/wm/window_manager.cc b/mash/wm/window_manager.cc
index e2c1379e6a6e7bcd96253ef37c3b3d5c06995a71..5e2b3f5827e5c5af369559ef6c0edd6d36192cc9 100644
--- a/mash/wm/window_manager.cc
+++ b/mash/wm/window_manager.cc
@@ -175,7 +175,7 @@ void WindowManager::OnAccelerator(uint32_t id, const ui::Event& event) {
 }
 
 void WindowManager::ScreenlockStateChanged(bool locked) {
-  // Hide USER_PRIVATE windows when the screen is locked.
+  // Hide USER_PRIVATE_CONTAINER windows when the screen is locked.
   mus::Window* window = root_controller_->GetWindowForContainer(
       mash::wm::mojom::Container::USER_PRIVATE);
   window->SetVisible(!locked);