Convert editing/deleting/delete-3928305-fix.html to use w3c test harness
This patch converts "editing/deleting/delete-3928305-fix.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/7b6cfcb832a6ba764490517eb23dd4f616ebd0a5
Cr-Commit-Position: refs/heads/master@{#407080}