Convert editing/inserting/paragraph-separator-0[123].html to use w3c test harness
This patch converts "editing/inserting/paragraph-separator-0[123].html"
to use w3c test harness to simplify test script for improving readability, and
consolidates into "insert_paragraph_separator.html" since these files are
in same patch at beginning.
BUG=n/a
TEST=n/a; no behavior changes
Committed:
https://crrev.com/07fbfac91e8b5f2160a041f16c9c57ccf1dcd613
Cr-Commit-Position: refs/heads/master@{#415198}