GitLab

- Add test for ignore comments for js_modulizer script
- Fix bug in the script, where an ignore starting at the very beginning
of the line did not get removed
- Remove dummy importHtml and instead use the new ignore comments to
remove these calls in tests.

Bug: 965770
Change-Id: I6f63861bef6e93ae918d54273f905c0cc372dbc5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1793743Reviewed-by: Demetrios Papadopoulos <dpapad@chromium.org>
Commit-Queue: Rebekah Potter <rbpotter@chromium.org>
Cr-Commit-Position: refs/heads/master@{#695381}