[Desktop] Show an infobar that sync v2 is coming

[petemill]

This would be for versions 1.11.x and above.

Text:

A new Brave Sync is coming. Get ready for the upgrade. More information

Link destination: https://brave.com/sync-v2-is-coming

[petemill]

Merged to v1.11.x via brave/brave-core#5806

[btlechowski]

Marking as QA/Blocked - need a new build to test, 1.11.92 or newer.

[LaurenWags]

Removing QA/Blocked since https://github.com/brave/brave-browser/releases/tag/v1.11.92 is available

[LaurenWags]

sync info bar disappears before I can interact with it - logged #10621 which blocks this issue from being tested.

[kjozwiak]

Removing QA/Blocked as brave/brave-core#6070 was merged.

[LaurenWags]

Verified passed with

Brave	1.11.96 Chromium: 84.0.4147.89 (Official Build) (64-bit)
Revision	19abfe7bcba9318a0b2a6bc6634a67fc834aa592-refs/branch-heads/4147@{#852}
OS	macOS Version 10.14.6 (Build 18G3020)

• Verified test plan from [base 1.11.x beta] Sync: Display a deprecation warning for users of sync v1 brave-core#5806

Additional scenarios checked:
Scenario 1:

1. Install 1.10.97
2. Enable brave://flags flag for brave sync
3. Restart, dismiss default browser bar
4. Create a sync chain at brave://sync
5. Update to 1.11.x
6. Confirm info bar is shown

Scenario 2:

1. Install 1.10.97
2. Leave sync flag as Default (sync is disabled)
3. Restart, dismiss default browser bar
4. Update to 1.11.x
5. Confirm no info bar is shown

Scenario 3:

1. Install 1.10.97
2. Set sync flag to Disabled
3. Restart, dismiss default browser bar
4. Update to 1.11.x
5. Confirm no info bar is shown

Scenario 4:

1. Install 1.10.97
2. Set sync flag to Enabled
3. Restart, dismiss default browser bar
4. Set up sync chain
5. Set sync flag to Disabled
6. Restart browser.
7. Update to 1.11.x
8. Confirm no info bar is shown

---

Verification passed on

Brave | 1.11.96 Chromium: 84.0.4147.89 (Official Build) (64-bit)
-- | --
Revision | 19abfe7bcba9318a0b2a6bc6634a67fc834aa592-refs/branch-heads/4147@{#852}
OS | Windows 10 OS Version 1903 (Build 18362.900)

• Verified test plan from [base 1.11.x beta] Sync: Display a deprecation warning for users of sync v1 brave-core#5806

Test A: - PASS

• Verified that the info bar is shown A new Brave Sync is coming and will affect your setup. Get ready for the upgrade
  

Test B: - PASS

• Verified that click on Learn more removed the sync info bar

Test C: - PASS

• Verified that click on x and restart browser removed the sync info bar

• Verified the scenarios (1 to 4) mentioned above and ensured which are working as expected.

• Verified test plan from [base 1.11.x beta] Sync: Display a deprecation warning for users of sync v1 brave-core#5806

Additional scenarios checked:
Scenario 1:

1. Install 1.10.97
2. Enable brave://flags flag for brave sync
3. Restart, dismiss default browser bar
4. Create a sync chain at brave://sync
5. Update to 1.11.x
6. Confirm info bar is shown

Scenario 2:

1. Install 1.10.97
2. Leave sync flag as Default (sync is disabled)
3. Restart, dismiss default browser bar
4. Update to 1.11.x
5. Confirm no info bar is shown

Scenario 3:

1. Install 1.10.97
2. Set sync flag to Disabled
3. Restart, dismiss default browser bar
4. Update to 1.11.x
5. Confirm no info bar is shown

Scenario 4:

1. Install 1.10.97
2. Set sync flag to Enabled
3. Restart, dismiss default browser bar
4. Set up sync chain
5. Set sync flag to Disabled
6. Restart browser.
7. Update to 1.11.x
8. Confirm no info bar is shown