ash/mus: Store the InterfaceRequest<>s directly in the vector.

ash/mus/window_manager_application.h

Index: ash/mus/window_manager_application.h
diff --git a/ash/mus/window_manager_application.h b/ash/mus/window_manager_application.h
index ceb88aeac9d8c2fc20ab33d84a1bf2b93e00e300..ebb1b9a51b3e7ff951e7959f23e10eddb90dbbd6 100644
--- a/ash/mus/window_manager_application.h
+++ b/ash/mus/window_manager_application.h
@@ -106,7 +106,7 @@ class WindowManagerApplication
   // time |shelf_layout_requests_| stores pending interface requests.
   std::unique_ptr<ShelfLayoutImpl> shelf_layout_;
   mojo::BindingSet<mojom::ShelfLayout> shelf_layout_bindings_;
-  std::vector<std::unique_ptr<mojo::InterfaceRequest<mojom::ShelfLayout>>>
+  std::vector<mojo::InterfaceRequest<mojom::ShelfLayout>>
       shelf_layout_requests_;
 
   // |user_window_controller_| is created once OnEmbed() is called. Until that
@@ -114,8 +114,7 @@ class WindowManagerApplication
   std::unique_ptr<UserWindowControllerImpl> user_window_controller_;
   mojo::BindingSet<mojom::UserWindowController>
       user_window_controller_bindings_;
-  std::vector<
-      std::unique_ptr<mojo::InterfaceRequest<mojom::UserWindowController>>>
+  std::vector<mojo::InterfaceRequest<mojom::UserWindowController>>
       user_window_controller_requests_;
 
   std::unique_ptr<WindowManager> window_manager_;