Hide autofill popup when showing account chooser or suggested menu.

This helps make the autofill popup feel less sticky.

BUG=259529
TEST=no autofill popup showing when changing accounts or selecting suggestion
R=isherman@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/26603009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@228718 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 228718