mash: wires up shadows for mash

services/ui/ws/window_manager_state.cc

Index: services/ui/ws/window_manager_state.cc
diff --git a/services/ui/ws/window_manager_state.cc b/services/ui/ws/window_manager_state.cc
index 76c5684e6110498d51a7509a25e4321dfa7fd6cb..2103f4c62079a686c4d764a89cd7ac60d42b0049 100644
--- a/services/ui/ws/window_manager_state.cc
+++ b/services/ui/ws/window_manager_state.cc
@@ -487,6 +487,9 @@ void WindowManagerState::HandleDebugAccelerator(DebugAcceleratorType type) {
                  << display_root->root()->GetDebugWindowHierarchy();
     }
   }
+  ServerWindow* focused_window = GetFocusedWindowForEventDispatcher();
+  LOG(ERROR) << "Focused window: "
+             << (focused_window ? focused_window->id().ToString() : "(null)");
 #endif
 }