Fixed object-src tests

As part of checking if the linked bug is still an issue, I have taken
the opportunity to fix the current mostly non-sensical tests.

Bug: 240058
Change-Id: I716d43d38be6dd161aa0437dbda03f2c77eb6d88
Reviewed-on: https://chromium-review.googlesource.com/c/1225886
Commit-Queue: Andy Paicu <andypaicu@chromium.org>
Reviewed-by: Mike West <mkwst@chromium.org>
Cr-Commit-Position: refs/heads/master@{#596662}
21 files changed