Fix Georgian font selection on Windows 7

Change FontFallbackWin to specify Sylfaen before Segoe UI for Georgian.
The Segoe UI font is present on Windows 7 and therefore matches despite
not having the required glyphs for Georgian.

BUG=606196
TBR=drott@chromium.org

Review URL: https://codereview.chromium.org/1961083004 .

Cr-Commit-Position: refs/heads/master@{#392452}
2 files changed