[Security] Do not connect to accounts.google.com on enabling sync-v2

[jumde]

Description

A request to accounts.google.com is initiated when enabling sync.

Steps to Reproduce

1. Enable sync on a fresh profile

Actual result:

Request to accounts.google.com initiated

Expected result:

Should not be initiated

Reproduces how often:

Easily

Brave version (brave://version info)

1.19.33 Chromium: 87.0.4280.67 (Official Build) nightly (x86_64)

Version/Channel Information:

• Can you reproduce this issue with the current release? No
• Can you reproduce this issue with the beta channel? No
• Can you reproduce this issue with the nightly channel? Yes

[diracdeltas]

cc @darkdh

[jumde]

Fix being discussed here: https://bravesoftware.slack.com/archives/C2HJYB45N/p1606867060133000

[AlexeyBarabash]

Also reproducible on stable

Brave	1.18.70 Chromium: 87.0.4280.101 (Official Build) unknown (64-bit)

and beta

Brave	1.19.60 Chromium: 87.0.4280.101 (Official Build) unknown (64-bit)

[bbondy]

Re-opening since it was reverted due to a windows build failure here: brave/brave-core#7470

[GeetaSarvadnya]

Verification is in-progress

Brave | 1.20.86 Chromium: 88.0.4324.96 (Official Build) dev (64-bit)
-- | --
Revision | 68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784}
OS | Windows 10 OS Version 2004 (Build 19041.746)

• Verified the STR from the description

Reproduced the issue in 1.19.86

Issue is fixed in 1.20.86 - ensured that the account.google.com domain isn't listed when standalone sync is initiated

• Verified the test plan from Get rid of IdentityManager call in ProfileSyncService brave-core#7480

Reproduced the issue in 1.19.86

Issue is fixed in 1.20.86 - ensured that the account.google.com domain isn't listed when standalone sync is initiated

---

Verification passed on

Brave	1.20.86 Chromium: 88.0.4324.96 (Official Build) dev (64-bit)
Revision	68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784}
OS	Ubuntu 18.04 LTS

Verified test plan from the description
Verified no connection to accounts.google.com

Verified test plan from brave/brave-core#7480
Verified on 1.20.86(dev) and 1.20.85(beta)

Verified also on macOS, using the testplan from brave/brave-core#7480

Reproduced the issue in release, using:

Brave	1.19.86 Chromium: 88.0.4324.96 (Official Build) (x86_64)
Revision	68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784}
OS	macOS Version 11.1 (Build 20C69)

Then verified it's FIXED, using:

Brave	1.20.90 Chromium: 88.0.4324.96 (Official Build) dev (x86_64)
Revision	68dba2d8a0b149a1d3afac56fa74648032bcf46b-refs/branch-heads/4324@{#1784}
OS	macOS Version 11.1 (Build 20C69)

Finally, a comparison of the two:

[rhee876527]

This still isn't fixed. At least on Android. Any good reason this was looked over?