GitLab

Despite its name, the test checks the mixed content check for sendBeacon.
This CL moves it to wpt/mixed-content.

Bug: 821294
Change-Id: Ifd264dae0fec5c4d821d61d37d61f4ebbc763516
Reviewed-on: https://chromium-review.googlesource.com/959982Reviewed-by: Mike West <mkwst@chromium.org>
Commit-Queue: Yutaka Hirano <yhirano@chromium.org>
Cr-Commit-Position: refs/heads/master@{#543105}