Mac: zoom title and favicon during tabpose zoom animation

BUG=50307
TEST=Zoom out in slomo. Favicon and tab titles should fly in like the thumbnails. Zoom back in, they should still look correct.

Review URL: http://codereview.chromium.org/5764002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@69323 0039d316-1c4b-4281-b951-d872f2087c98