Converts ash/wm/mru_window_tracker_unittest.cc to use AshTest

services/ui/public/interfaces/window_manager.mojom

Index: services/ui/public/interfaces/window_manager.mojom
diff --git a/services/ui/public/interfaces/window_manager.mojom b/services/ui/public/interfaces/window_manager.mojom
index 1a090b7d351b2203cb1f2e67864f2b8117b68b32..c02785e7c78ba10ec2b7c7f0d26cf2a128ae00b6 100644
--- a/services/ui/public/interfaces/window_manager.mojom
+++ b/services/ui/public/interfaces/window_manager.mojom
@@ -29,6 +29,9 @@ interface WindowManager {
   // window. This is typically done if the client wants to handle immersive
   // themselves. Type: bool.
   const string kDisableImmersive_Property = "prop:disable_immersive";
+  // Used to explicitly control whether a window appears in the most recently
+  // used list of windows. Type: bool.
+  const string kExcludeFromMru_Property = "prop:exclude_from_mru";
   // Initial bounds to create the window at. If empty the WindowManager decides
   // the initial bounds.
   const string kInitialBounds_Property = "prop:initial_bounds";