Summary:
The new treestate was designed to store fsmonitor state. Use it to make
fsmonitor and dirstate state consistent, and avoid fsmonitor state
invalidation.
The "fsmonitor identity" check was removed as we now rely on the dirstate
identity check - dirstate and fsmonitor state must be updated consistently -
both updated or neither updated.
Since this is the first dirstate that tracks "untracked" files, several places
are adjusted (ex. dmap.dropfile, dmap.keys) to take the new untracked files
into consideration.
Reviewed By: wez
Differential Revision: D7909172
fbshipit-source-id: 05fd64b25c67ae4b07bc8cfee2731c748205975e
Summary: This allows us to dogfood the new treestate.
Reviewed By: markbt
Differential Revision: D7912559
fbshipit-source-id: bfb30cd9989460b0eae859aeed402bd92776ab0a
