Reland "remove dead code around SK_SUPPORT_LEGACY_FONT_FLAGS"

This reverts commit c41a41d67e585ce3beee3934864a56a2d841386c.

Reason for revert: hmmm, this might still work in Fuchsia...

Original change's description:
> Revert "remove dead code around SK_SUPPORT_LEGACY_FONT_FLAGS"
> 
> This reverts commit 3b155a77c3704c3f3c5b741d60990e5ee959b261.
> 
> Reason for revert: breaks fuchsia (needs to roll newer flutter)
> 
> Original change's description:
> > remove dead code around SK_SUPPORT_LEGACY_FONT_FLAGS
> > 
> > Bug: skia:
> > Change-Id: I5a36e6827610c2a429e2f8b36adf432b95993c54
> > Reviewed-on: https://skia-review.googlesource.com/c/171529
> > Reviewed-by: Mike Reed <reed@google.com>
> > Commit-Queue: Mike Reed <reed@google.com>
> 
> TBR=reed@google.com
> 
> Change-Id: I37bfab86e4a4243ddd94255aa0b126414bd9e835
> No-Presubmit: true
> No-Tree-Checks: true
> No-Try: true
> Bug: skia:
> Reviewed-on: https://skia-review.googlesource.com/c/171536
> Reviewed-by: Mike Reed <reed@google.com>
> Commit-Queue: Mike Reed <reed@google.com>

TBR=reed@google.com

Change-Id: I12183ecfb5e17b8919afbce7b42dad2064ee93b3
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: skia:
Reviewed-on: https://skia-review.googlesource.com/c/171538
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2 files changed