Google Calendar Extension won't authenticate

Test Plan

Specified here: https://github.com/brave/brave-core/pull/5616

Description

When installing the Google Calendar extension, authorization is required independently from browser auth. This takes place from within the app itself. After selecting “Authorize…”, extension process halts and gets stuck on Authorizing:

No options found in Settings, Shields or ext. settings resolve the issue or change behavior. Console view on extension background page has no output. Tested on both macOS Mojave (latest) and Windows 10 OS.

Steps to Reproduce

1. Download the Google Calendar extension
2. Install and click Authorize Google Calendar

Actual result:

Auth process halts, hangs on Authorizing message

Expected result:

Google Calendar to authorize and authenticate my account.

Reproduces how often:

Always

Brave version (brave://version info)

0.64.77 Chromium: 74.0.3729.169 (Official Build) (64-bit)

Revision | 78e4f8db3ce38f6c26cf56eed7ae9b331fc67ada-refs/branch-heads/3729@{#1013} OS | Mac OS X

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 dev channel? ✅
• Can you reproduce this issue with the nightly channel? ✅

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? No
• Does the issue resolve itself when disabling Brave Rewards? No
• Is the issue reproducible on the latest version of Chrome? No

Miscellaneous Information:

Users reporting the same behavior – not the first time I’ve seen it. Worth addressing given it’s popularity. https://community.brave.com/t/google-calendar-by-manas-tungare-will-not-authorise-with-google-in-brave/50628

[GeetaSarvadnya]

Verification passed on

Brave | 1.14.66 Chromium: 85.0.4183.83 (Official Build) dev (64-bit)
-- | --
Revision | 94abc2237ae0c9a4cb5f035431c8adfb94324633-refs/branch-heads/4183@{#1658}
OS | Windows 10 OS Version 1903 (Build 18362.1016)

• Verified STR from the description
• Google calendar is authorized using Gmail account without any hanging or freezing
• Verified able to open Google calendar and create an event in the calendar

Verification passed on

Brave	1.14.68 Chromium: 85.0.4183.83 (Official Build) dev (64-bit)
Revision	94abc2237ae0c9a4cb5f035431c8adfb94324633-refs/branch-heads/4183@{#1658}
OS	Ubuntu 18.04 LTS

• Verified STR from the description
• Google calendar is authorized using Gmail account without any hanging or freezing
• Verified able to open Google calendar and create an event in the calendar

Verification PASSED on macOS 10.15.6 x64 using the following build:

Brave | 1.14.81 Chromium: 85.0.4183.102 (Official Build) (64-bit)
-- | --
Revision | ffe848af6a5df4fa127e2929331116b7f9f1cb30-refs/branch-heads/4183@{#1770}
OS | macOS Version 10.15.6 (Build 19G73)

• extensive QAing done also completed via https://github.com/brave/brave-browser/issues/11444#issuecomment-689531476
• ensured that clicking on Authorize Google Calendar doesn’t freeze/hang Brave when Allow Google login for extensions is disabled under brave://settings/extensions
• ensured that clicking on Authorize Google Calendar opens a new tab that lets you login into Google once Allow Google under brave://settings/extensions has been enabled
• ensured that you can authorize Google Calendar once Allow Google login for extensions has been enabled under brave://settings/extensions

Google Login Enabled

Google Login Disabled

[jumde]

@GalianFuria - Could you try enabling Allow Google login for extensions in brave://settings/extensions and check if it works for you. Thanks!