Compat issue with poliigon

[ChildishGiant]

Description

Search broken by shields on poliigon.com

Steps to Reproduce

Visit https://www.poliigon.com/search?type=texture

Actual result:

Expected result:

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.2.43 Chromium: 79.0.3945.130 (Official Build) (64-bit)
Revision	e22de67c28798d98833a7137c0e22876237fc40a-refs/branch-heads/3945@{#1047}
OS	Windows 10 OS Version 1903 (Build 18362.592)

Brave	1.5.43 Chromium: 79.0.3945.130 (Official Build) nightly (64-bit)
Revision	e22de67c28798d98833a7137c0e22876237fc40a-refs/branch-heads/3945@{#1047}
OS	Windows 10 OS Version 1903 (Build 18362.592)

Version/Channel Information:

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

Other Additional Information:

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

[ryanbr]

Cookie issues. Seems to be blocking the site cookies.