tree cffb52af82788de8de5b73ac1ce811a7be0544d1
parent 53e2309627c0d18f4dd55e6214b3c10a2bfcdbcf
author Jonathan Amsterdam <jba@google.com> 1509394545 -0400
committer Jonathan Amsterdam <jba@google.com> 1509530967 +0000

firestore: better treatment of ServerTimestamp and Delete

- More checking for incorrect use of these sentinels.

- A small optimization: a map with only ServerTimestamps as values
  turns into nil, instead of an empty map.

Change-Id: Ia79348d6637eac845e77acbb4a622539a9147f44
Reviewed-on: https://code-review.googlesource.com/19050
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Michael Darakananda <pongad@google.com>