Sets the initial value of is_auxiliary_text_visible.

BUG=330870, 330846
TBR=komatsu@chromium.org
TEST=unit_tests passes

Review URL: https://codereview.chromium.org/106583006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242692 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242692