Settings: "Allow" dropdown is not showing on the first click.
This bug was triggered by Blink r147680.
A menulist SELECT element in a list item opened by the first mouse
press but it was closed immediately because the mouse press selected
the the list item, and it tiggered focus on the INPUT field.
This CL fixes the bug by avoid INPUT focus if the SELECT is focused.
BUG=257954
R=dbeam@chromium.org
Review URL: https://codereview.chromium.org/
19083002
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@211763 0039d316-1c4b-4281-b951-d872f2087c98