[Editing][CodeHealth] Convert editing/selection to utilize w3c test harness part 1.
This patch converts following tests to utilize
w3c test harness with |assert_selection()| to ease of maintenance for improving
code health('=>' means move/renaming):
LayoutTests/editing/selection/4947387.html =>
LayoutTests/editing/selection/modify_move/move-by-paragraph.html
LayoutTests/editing/selection/after-line-wrap.html =>
LayoutTests/editing/selection/modify_move/move-forward-after-line-break.html
LayoutTests/editing/selection/click-left-of-rtl-wrapping-text.html =>
LayoutTests/editing/selection/mouse/click-left-of-rtl-wrapping-text.html
This is preparation to remove default styles on contenteditable containers.
See crbug.com/427135.
BUG=
427135,
679977
Review-Url:
https://codereview.chromium.org/2525273002
Cr-Commit-Position: refs/heads/master@{#442837}
Committed:
https://chromium.googlesource.com/chromium/src/+/f7bdce1813bc2651979ad6f2bab34be1d44bc098