Convert editing/selection/5234383-[12].html to use w3c test harness
This patch converts "editing/selection/5234383-[12].html" to use w3c
test harness to simplify test files and consolidate into
"move_by_sentence_boundary.html" with additional test cases to improve test
coverage.
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/afaa923d7e5acab54ae4470cdfeac225f272a8c0
Cr-Commit-Position: refs/heads/master@{#408057}