Change FontFallbackWin to use FamilyNameIterator

Change the windows font fallback code to use SkTypeface and
createFamilyNameIterator to check whether a font exists instead of
calling GDI directly. This removes the last use of HFONT for DW builds
and supports fonts with locale dependent names.

BUG=251355
R=bungeman@chromium.org

Review URL: https://codereview.chromium.org/180143002

git-svn-id: svn://svn.chromium.org/blink/trunk@167917 bbb929c8-8fbe-4397-9dbb-9b2b20218538