[Sync] Stop purging sync data on restart for users who haven't finished setup.

[Sync] Stop purging sync data on restart for users who haven't finished setup.

Users who don't have first setup complete, but are signed in without sync
suppressed, are in an invalid state, likely from previous issues in the
sign in flow. We were purging their sync data over-aggressively on startup
previously, causing a resync of the control types on each restart. Now we
simply leave the data around, and only purge if the user is actually signed
out.

BUG=624915
Review-Url: https://codereview.chromium.org/2113453006
Cr-Commit-Position: refs/heads/master@{#403382}
(cherry picked from commit 68623971be0cfc492a2cb0427d7f478e7b214c24)

Committed: https://chromium.googlesource.com/chromium/src/+/97128793647d0829e901967a6524563f6796fed2

[Nicolas Zea, 2016-07-06 20:48:34]

Description was changed from

==========
[Sync] Stop purging sync data on restart for users who haven't finished setup.

Users who don't have first setup complete, but are signed in without sync
suppressed, are in an invalid state, likely from previous issues in the
sign in flow. We were purging their sync data over-aggressively on startup
previously, causing a resync of the control types on each restart. Now we
simply leave the data around, and only purge if the user is actually signed
out.

BUG=624915

Review-Url: https://codereview.chromium.org/2113453006
Cr-Commit-Position: refs/heads/master@{#403382}
(cherry picked from commit 68623971be0cfc492a2cb0427d7f478e7b214c24)
==========

to

==========
[Sync] Stop purging sync data on restart for users who haven't finished setup.

Users who don't have first setup complete, but are signed in without sync
suppressed, are in an invalid state, likely from previous issues in the
sign in flow. We were purging their sync data over-aggressively on startup
previously, causing a resync of the control types on each restart. Now we
simply leave the data around, and only purge if the user is actually signed
out.

BUG=624915

Review-Url: https://codereview.chromium.org/2113453006
Cr-Commit-Position: refs/heads/master@{#403382}
(cherry picked from commit 68623971be0cfc492a2cb0427d7f478e7b214c24)

Committed:
https://chromium.googlesource.com/chromium/src/+/97128793647d0829e901967a6524...
==========

[Nicolas Zea, 2016-07-06 20:48:35]

Committed patchset #1 (id:1) manually as
97128793647d0829e901967a6524563f6796fed2.