Use w3c test harness in editing/selection/vertical-*.html tests 3/3
This patch makes editing/selection/vertical-*.html to use w3c test harness
rather than pixel match for ease of maintain.
This is the first patch of three patches of rewriting vertical-*.html.
Due by Windows command prompt limitation, we can't upload once.
BUG=n/a
TEST=n/a; no behavior changes
Review URL: https://codereview.chromium.org/1466543003
Cr-Commit-Position: refs/heads/master@{#361270}
37 files changed
