Split JsonMessageCodec out from JsonMethodCodec#150

Merged

awdavies merged 2 commits intogoogle:masterfrom

stuartmorgan-g:linux-message-codec

Nov 14, 2018

Commits on Nov 11, 2018

Split JsonMessageCodec out from JsonMethodCodec
stuartmorgan-g
committed

Commits on Nov 14, 2018

Fix method comment
stuartmorgan-g
committed