Support fCapHeight in SkScalerContext_DW

BUG=chromium:681857

Change-Id: Ia97354d7798eb685351a98ff559bcf176a67af18
Reviewed-on: https://skia-review.googlesource.com/7380
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
1 file changed