tree b28df0c3e41628046c4b144c89bb98e1fb9b9409
parent fae857ddf5504e26032b734c4a41cc8c8ec9360c
author pastarmovj <pastarmovj@chromium.org> 1478179421 -0700
committer Commit bot <commit-bot@chromium.org> 1478179671 +0000

Adds a new switch for enabling the new local server backend.

Actually two flags which play in tandem:

--enable-local-sync-backend and --local-sync-backend-dir

The second is respected only if the first one is specified.
Eventually those will be controlled by policy but the flags will allow
easier testing and potentially unlock the feature for advanced users.

For now sign-in is needed to kick the sync logic on but the data
is only stored locally when this flag is specified.

This CL is identical to https://codereview.chromium.org/2442453002/
with only a changed type of the kLoopbackServerBackendFilename
constant according to the size bot recommendation.

BUG=651411
TEST=unit_tests/manual.
TBR=pavely

Review-Url: https://codereview.chromium.org/2473613003
Cr-Commit-Position: refs/heads/master@{#429558}