tree 9d0bcb034d46e1c961013f196131cd78844553f5
parent 60b812715517f99e3bca764bbe06bb205e96f2e5
author yjbanov <yjbanov@google.com> 1456969809 -0800
committer yjbanov <yjbanov@google.com> 1456970476 -0800

[driver] serialize commands to plain strings

Turns out VM service only accepts flat parameter name/value pairs. It
only worked this far because vm_service_client (mistakenly) uses JSON
encoder to encode parameters.

This change separates the Command type hierarchy from that of Result and
tightens type constraints on Command object parameters.