commit 8e411d16171d27612776a2f05356b0ed9f06b848
author joone.hur <joone.hur@intel.com> Mon Jun 13 06:55:43 2016
committer Commit bot <commit-bot@chromium.org> Mon Jun 13 06:57:32 2016
tree db862fcf75787c9bca96eb088eea9e1f932046b1
parent d688b3e828f5eb8cec391d0126e362cbf1eb48db

Don't need to preserve CSS line-height property during editing operation

When we merge two paragraphs by typing backspace key at the head
of the second paragraph, the styles of the second paragraph can be
preserved by using <span> tag. However, we don't need to preserve
line-height style because the computed value can be different from
the value defined in HTML.

BUG=226941
TEST=editing/deleting/backspace-merge-two-paragraphs.html

Review-Url: https://codereview.chromium.org/2064473002
Cr-Commit-Position: refs/heads/master@{#399410}