Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/app_list_main_view_unittest.cc

Index: ui/app_list/views/app_list_main_view_unittest.cc
diff --git a/ui/app_list/views/app_list_main_view_unittest.cc b/ui/app_list/views/app_list_main_view_unittest.cc
index 5cfa290c5fb7f57ab1944602be04ad963d9ce5fe..44bc5a9a011bfa4f3dc5cef3c33750b470251402 100644
--- a/ui/app_list/views/app_list_main_view_unittest.cc
+++ b/ui/app_list/views/app_list_main_view_unittest.cc
@@ -85,7 +85,7 @@ class AppListMainViewTest : public views::ViewsTestBase {
     // In Ash, the third argument is a container aura::Window, but it is always
     // NULL on Windows, and not needed for tests. It is only used to determine
     // the scale factor for preloading icons.
-    main_view_ = new AppListMainView(delegate_.get());
+    main_view_ = new AppListMainView(delegate_.get(), nullptr);
     main_view_->SetPaintToLayer();
     main_view_->model()->SetFoldersEnabled(true);
     search_box_view_ = new SearchBoxView(main_view_, delegate_.get());