FSA: Fix message* includes for manual WPTs
These scripts were copied to fs/
(08245bdd5a1b9f5364817f9c92fc81b1d8adbfd0), and then later were deleted
from file-system-access
(WebKit/WebKit@fe46c0d).
This updates the includes to rely on the copy in fs/.
Bug: 346991169
Change-Id: I4d92898e07c3364049b9a2a800a5b3f3efc434b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5867990
Reviewed-by: Christine Hollingsworth christinesm@chromium.org
Commit-Queue: Nathan Memmott memmott@chromium.org
Cr-Commit-Position: refs/heads/main@{#1356530}