Application crashes when calculating the winning page classification category

[tmancey]

Description

Application crashes when calculating the winning page classification category to decide which ads to show to the user

Steps to Reproduce

1. Change the OS locale to "United States"
2. View a Brave Ad
3. Quit the browser
4. Change the OS locale to an untargeted locale (such as Denmark)
5. Launch the browser
6. View a Brave Ad

Actual result:

The application crashes when calculating the winning page classification category
Application crashes

Expected result:

The application should not crash when calculating the winning page classification category
Brave Ad should be shown and application should not crash

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Version/Channel Information:

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

Other Additional Information:

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

Miscellaneous Information:

[tmancey]

The issue has been reproduced on Android #8415 (comment), awaiting state files from @SergeyZhukovsky to reproduce

[tmancey]

Raised this issue to fix crashes 4 and 7 for https://github.com/brave/browser-android-tabs/issues/2435

[GeetaSarvadnya]

Verification passed on

Brave	1.4.96 Chromium: 80.0.3987.132 (Official Build) (64-bit)
Revision	fcea73228632975e052eb90fcf6cd1752d3b42b4-refs/branch-heads/3987@{#974}
OS	Windows 10 OS Version 1803 (Build 17134.1006)

• Verified STR from the description

Verification passed on

Brave	1.4.96 Chromium: 80.0.3987.132 (Official Build) (64-bit)
Revision	fcea73228632975e052eb90fcf6cd1752d3b42b4-refs/branch-heads/3987@{#974}
OS	Ubuntu 18.04 LTS

• Verified test plan from the description

Verified passed with

Brave	1.4.96 Chromium: 80.0.3987.132 (Official Build) (64-bit)
Revision	fcea73228632975e052eb90fcf6cd1752d3b42b4-refs/branch-heads/3987@{#974}
OS	macOS Version 10.14.6 (Build 18G3020)

• Verified STR from description
• Ensured crash as specified in Fixes application crashes when calculating the winning page classification category brave-core#4770 (comment) was not shown in terminal logs and Ad was successfully shown for Denmark locale.