Auto merge of #23593 - georgeroman:fix_panic_on_opening_directory, r=Manishearth

Fix panic on opening a directory

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors

Continued from https://github.com/servo/servo/pull/23548

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tests/wpt/metadata/webdriver/tests/get_current_url/get.py.ini

@@ -1,2 +1,7 @@
 [get.py]
-  disabled: for now
+  [test_no_browsing_context]
+    expected: ERROR
+
+  [test_get_current_url_nested_browsing_context]
+    expected: FAIL
+

tests/wpt/metadata/webdriver/tests/navigate_to/navigate.py.ini

@@ -1,2 +1,4 @@
 [navigate.py]
-  disabled: for now
+  [test_no_browsing_context]
+    expected: ERROR
+