Stop using script-tests in fast/dom/.

third_party/WebKit/LayoutTests/fast/dom/HTMLElement/script-tests/class-list-gc.js

-description('This tests that properties on the classList persists GC.');
-
-function gc()
-{
-    if (window.GCController)
-        return GCController.collect();
-
-    for (var i = 0; i < 10000; i++) {
-        var s = new String;
-    }
-}
-
-var d = document.createElement('div');
-
-// Ensure the classList is created.
-var classList = d.classList;
-
-// Set a custom property.
-d.classList.life = 42;
-shouldEvaluateTo('d.classList.life', 42);
-
-// Null out reference to the dataset.
-classList = null;
-
-gc();
-
-// Test that the classList wrapper persisted the GC and still has the custom property.
-shouldEvaluateTo('d.classList.life', 42);