Use Skia for font selection on windows

Changes windows to use Skia (instead of GDI directly) for font selection and fallback handling on windows. Only applies if the GDI_FONTS_ON_WINDOWS flag is unset.

BUG=249099

Review URL: https://chromiumcodereview.appspot.com/21353004

git-svn-id: svn://svn.chromium.org/blink/trunk@156339 bbb929c8-8fbe-4397-9dbb-9b2b20218538