Generate located Windows keycodes for number pad keys under Ozone

Makes Ozone's XKB keyboard layout support generate Windows keycodes
VKEY_NUMPAD0 through VKEY_NUMPAD9 for number pad keys, rather than
VKEY_0 through VKEY_9, to match the X11 behaviour.

BUG=574458

Review URL: https://codereview.chromium.org/1566463002

Cr-Commit-Position: refs/heads/master@{#381709}
2 files changed