housekeeping: m_seenFiles, m_callback, renaming
Summary:
Code cleanup
* snake_case -> camelCase in various places
* Package::m_parsingInputs -> m_inputMicros (same timer used for index + parse phases)
* Package::m_parsingOndemand -> m_ondemandMicros
* Package::m_parsedFiles -> m_seenFiles (better reflects actual purpose)
* thread `const ParseCallback&` as an argument instead of stateful Package field
Reviewed By: ricklavoie
Differential Revision:
D38793794
fbshipit-source-id:
9831f249e2ebf476f6ed6a4633555a0bf4efbee0