Cannot leave sync chain when offline/error

[darkdh]

Description

Steps to Reproduce

1. Turn off network
2. Create sync chain offline
3. Try to leave sync chain

Actual result:

It will stuck in the same sync chain until network came online or server error resolved

Expected result:

Reset should take effect immediately

Reproduces how often:

Brave version (brave://version info)

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

[GeetaSarvadnya]

Verification passed on

Brave | 1.31.91 Chromium: 95.0.4638.69 (Official Build) (64-bit)
-- | --
Revision | 6a1600ed572fedecd573b6c2b90a22fe6392a410-refs/branch-heads/4638@{#984}
OS | Windows 10 Version 21H1 (Build 19043.1288)

• Verified the STR from the description

Clean profile

Initial Sync Chain	Disabled Network	Leaving Sync Chain	Left Sync Chain	Left Sync Chain

Upgrade profile

• Installed 1.31.88 and sync with 2nd device and add bookmarks in 1.31.88, upgrade the profile to 1.31.91 and disconnect the network and try to leave the sync chain, and confirm user can leave the sync chain when the network is disabled

1.31.88	1.31.91	Disconnect network	Leaving sync chain	Left sync chain

---

Verified using:

Brave | 1.31.91 Chromium: 95.0.4638.69 (Official Build) (x86_64)
-- | --
Revision | 6a1600ed572fedecd573b6c2b90a22fe6392a410-refs/branch-heads/4638@{#984}
OS | macOS Version 11.6.1 (Build 20G224)

Verified using the STR/Cases outlined via #19199. Basically made sure that you can leave a sync chain while the network is disabled.

Initial Sync Chain	Disabled Network	Leaving Sync Chain	Left Sync Chain	Left Sync Chain

Encountered #11166 (comment) while testing.

---

Verification passed on

Brave	1.31.91 Chromium: 95.0.4638.69 (Official Build) (64-bit)
Revision	6a1600ed572fedecd573b6c2b90a22fe6392a410-refs/branch-heads/4638@{#984}
OS	Ubuntu 18.04 LTS

Verified test plan from the description

[btlechowski]

Looks similar to #10879

[stephendonner]

Verified PASSED using Brave 1.31.91, Chromium 95.0.4638.69 on Android 9, Google Pixel XL.

Steps:

1. new install
2. created Sync chain
3. added desktop machine using Sync code words
4. disconnected from Wi-Fi
5. tapped on the trash-can icon to Delete / Remove the Sync seed device (Google Pixel XL) from the Sync chain

Confirmed I was able to leave the Sync chain successfully while offline.

example	example	example	example