History: Prevent time text from being ellipsized at some zoom levels.

BUG=329779
TEST=Open a fresh profile, and visit a single page. Open chrome://history
and ensure that there is only a single history entry. Now use Ctrl+ to zoom
the page. Ensure the the visit time is never ellipsized, even at high zoom
levels.

Review URL: https://codereview.chromium.org/99583012

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241922 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 241922