[Paint Preview] Don't drop hints for subset fonts

As noted in crbug/1010396 dropping hints breaks some CJK Freetype fonts.
Disabling this will slightly increase subset font sizes for fonts that
rely on bytecode hints. However, this seems to be uncommon based on the
discussion in the bug.

Change-Id: Ib2a621ebfcfad3fbc015f50ec7c5bf3b18e6fa7e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1873238
Auto-Submit: Calder Kitagawa <ckitagawa@chromium.org>
Reviewed-by: Mehran Mahmoudi <mahmoudi@chromium.org>
Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708190}

components/paint_preview/common/subset_font.cc

@@ -89,7 +89,6 @@ sk_sp<SkData> SubsetFont(SkTypeface* typeface, const GlyphUsage& usage) {
       hb_subset_input_glyph_set(input.get());  // Owned by |input|.
   usage.ForEach(base::BindRepeating(&AddGlyphs, base::Unretained(glyphs)));
   hb_subset_input_set_retain_gids(input.get(), true);
-  hb_subset_input_set_drop_hints(input.get(), true);
 
   HbFace subset_face(hb_subset(face.get(), input.get()));
   HbBlob subset_blob(hb_face_reference_blob(subset_face.get()));