FSA: Re-enable manual WPTs

The check for frame_ was accidentally flipped in this refactor:
2827c754150c3591e1ea1d9bbc3db947fbbcfef5.

A lot of the WPTs this bug was causing to fail are still failing because
they haven't been run in a long time. These will be fixed in follow up
CLs.

Bug: 346991169
Change-Id: I865e379f2048ecfaf044dd9467c53af2ef381b07
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5837824
Reviewed-by: Christine Hollingsworth <[email protected]>
Reviewed-by: danakj <[email protected]>
Commit-Queue: Nathan Memmott <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1355953}

fs/script-tests/FileSystemBaseHandle-IndexedDB.js

@@ -121,8 +121,7 @@ directory_test(async (t, root_dir) => {
 }, 'Store handle in IndexedDB using inline keys.');
 
 directory_test(async (t, root_dir) => {
-  const expected_root_name = '';
-  assert_equals(root_dir.name, expected_root_name);
+  const expected_root_name = root_dir.name;
 
   const db = await createDatabase(t, db => {
     const store = db.createObjectStore('store', {keyPath: 'key'});