The WASM platform populates a family asynchronously, so we can't
assume that a family will be populated straight after calling
ensurePopulated().
By adding a bool return to the function we can teach all the call
sites to behave as if the font family does not exist yet if the
font was not populated.
The WASM platform will then invalidate the font database when the
populated font's data comes in asynchronously, and then be ready
for another call to ensurePopulated, which this time will succeed
to populate the family.
Change-Id: I4e0e6211c10e5c1123beebd77aca28ac82ba7186
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
Reviewed-by: Aleksandr Reviakin <aleksandr.reviakin@qt.io>
23ecaf897f