Linux Aura: Fixes and improvements for cursor loader

ui/aura/test/aura_test_helper.cc

Index: ui/aura/test/aura_test_helper.cc
diff --git a/ui/aura/test/aura_test_helper.cc b/ui/aura/test/aura_test_helper.cc
index 501c3adf816238afd07b9c30db8891db1e14936d..fb9a81ec3a383e5bad5fb65d993cef3ae9f4c2d0 100644
--- a/ui/aura/test/aura_test_helper.cc
+++ b/ui/aura/test/aura_test_helper.cc
@@ -137,10 +137,6 @@ void AuraTestHelper::TearDown() {
     display::Screen::SetScreenInstance(nullptr);
   test_screen_.reset();
 
-#if defined(USE_X11)
-  ui::test::ResetXCursorCache();
-#endif
-
   Env::GetInstance()->SetActiveFocusClient(nullptr, nullptr);
   window_tree_client_setup_.reset();
   focus_client_.reset();