WIP: simplified display management in ash

ash/mus/window_manager.h

Index: ash/mus/window_manager.h
diff --git a/ash/mus/window_manager.h b/ash/mus/window_manager.h
index b424d381f881887c126302e102ca2c841284c003..67628c9783b1c01e89223eb42d02743cacb97c4d 100644
--- a/ash/mus/window_manager.h
+++ b/ash/mus/window_manager.h
@@ -63,7 +63,9 @@ class WmTestHelper;
 class WindowManager : public aura::WindowManagerDelegate,
                       public aura::WindowTreeClientDelegate {
  public:
-  WindowManager(service_manager::Connector* connector, Config config);
+  WindowManager(service_manager::Connector* connector,
+                Config config,
+                bool show_primary_host_on_connect);
   ~WindowManager() override;
 
   void Init(std::unique_ptr<aura::WindowTreeClient> window_tree_client,
@@ -193,6 +195,8 @@ class WindowManager : public aura::WindowManagerDelegate,
 
   const Config config_;
 
+  const bool show_primary_host_on_connect_;
+
   std::unique_ptr<::wm::WMState> wm_state_;
   std::unique_ptr<aura::PropertyConverter> property_converter_;