Convert editing/deleting/delete-contiguous-ws-001.html to use w3c test harness
This patch converts "editing/deleting/delete-contiguous-ws-001.html" to use w3c
test harness to simplify test files.
This patch is a preparation of getting rid of grammar checking feature.
BUG=
619452
TEST=n/a; this patch changes a test file
Committed:
https://crrev.com/54194784a446c68c87b44a41a2950c28ab384302
Cr-Commit-Position: refs/heads/master@{#407086}