Revert "Removed flaky import"

This reverts commit cdc1834.

Author: cwoffenden

test/test_browser.py

@@ -19,7 +19,7 @@
 
 import common
 from common import BrowserCore, RunnerCore, path_from_root, has_browser, Reporting, is_chrome, is_firefox, CHROMIUM_BASED_BROWSERS
-from common import create_file, parameterized, ensure_dir, disabled, test_file, WEBIDL_BINDER
+from common import create_file, parameterized, ensure_dir, disabled, flaky, test_file, WEBIDL_BINDER
 from common import read_file, EMRUN, no_wasm64, no_2gb, no_4gb, copytree
 from common import requires_wasm2js, parameterize, find_browser_test_file, with_all_sjlj
 from common import also_with_minimal_runtime, also_with_wasm2js, also_with_asan, also_with_wasmfs