Event content: provide toJson() instead of deriving from EC::Base

EventContent::Base has been made primarily for the sake of dynamic
polymorphism needed within RoomMessageEvent content (arguably, it might
not be really needed even there, but that's a bigger matter for another
time). When that polymorphism is not needed, it's easier for reading
and maintenance to have toJson() member function (or even specialise
JsonConverter<> outside of the content structure) instead of deriving
from EC::Base and then still having fillJson() member function. This
commit removes EventContent::Base dependency where it's not beneficial.

0 files changed, 0 insertions, 0 deletions