Browsing Filipino translation

UNUSED: () OR (chromeos) == False
note: 'Braille of element with the ARIA role tab.'
note: "The text in the keyboard overlay to show the label of the 'tab' key."
note: 'This is an ARIA widget role name shown on a braille display. If the translation is longer than 5 characters, try to abbreviate it according to local conventions, and when doing so, if reasonable, use all lowercase and avoid punctuation to keep the number of characters as low as possible.'
in: results/cr/chrome/browser/resources/chromeos/chromevox/strings/chromevox_strings.grd, as IDS_CHROMEVOX_ARIA_ROLE_TAB_BRL
in: upstream/cr-46.0.2490.64/chrome/app/chromeos_strings.grdp, as IDS_KEYBOARD_OVERLAY_TAB_KEY_LABEL