tree 5619791cd3d820fbee3fa26278d229a371da9406
parent 4ed84eb84e626674dd97a9aebf7fa07e334ff21b
author Tom Sepez <tsepez@chromium.org> 1561068290 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1561068290 +0000

Weakly cache CFX_FontMgr::FontDescs.

The intent is keep the FontDesc alive only so long as there at least
one CFX_Face that is still using it. This is similar to the
original manually counted implementation from FX than the current
implementation where we keep the FontDesc around for the lifetime
of the FontMgr.

- Avoid some circularity between CFX_Face and CFX_FontMgr::FontDesc
  by only telling CFX_Face that it has a retainable.

Change-Id: If8b441b9b1c2aa81892cb4cb62762a44a322dd0c
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/56652
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>