Don't use base::MessageLoop::{Quit,QuitClosure} in ui/

ui/app_list/views/apps_grid_view_unittest.cc

Index: ui/app_list/views/apps_grid_view_unittest.cc
diff --git a/ui/app_list/views/apps_grid_view_unittest.cc b/ui/app_list/views/apps_grid_view_unittest.cc
index a5f9926bff01cc0328efc28fad781566f869bb16..a4c74bc5ac662b2e47edad122406cc1ae45d5088 100644
--- a/ui/app_list/views/apps_grid_view_unittest.cc
+++ b/ui/app_list/views/apps_grid_view_unittest.cc
@@ -66,7 +66,7 @@ class PageFlipWaiter : public PaginationModelObserver {
     selected_pages_ += base::IntToString(new_selected);
 
     if (wait_)
-      ui_loop_->Quit();
+      ui_loop_->QuitWhenIdle();
   }
   void TransitionStarted() override {}
   void TransitionChanged() override {}