Add PRESUBMIT against usage of deprecated WebThreads.

Bug: 689520
Change-Id: Ie8418bc9afe6f9a106f5fdd85647006722dab50f
Reviewed-on: https://chromium-review.googlesource.com/595872
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Gabriel Charette <gab@chromium.org>
Commit-Queue: Francois Doray <fdoray@chromium.org>
Cr-Commit-Position: refs/heads/master@{#491041}
1 file changed