Purchase intent is not extracted from google.com

[btlechowski]

It works when searching google through URL bar.
It does not work when searching for keywords through google.com

This is a regression introduced in 1.14.x. Does not reproduce in 1.13.86.

Note: Issue found by @LaurenWags

Steps to Reproduce

1. Clean profile
2. Enable rewards
3. Wait till ads catalog and all components are downloaded
4. Close Brave
5. Open google.com and search for amd
6. Check purchaseIntentSignalHistory in ads_service/client.json

Actual result:

Purchase intent is not extracted from google.com

Expected result:

Purchase intent is extracted from google.com

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave	1.14.79 Chromium: 85.0.4183.83 (Official Build) dev (64-bit)
Revision	94abc2237ae0c9a4cb5f035431c8adfb94324633-refs/branch-heads/4183@{#1658}
OS	Ubuntu 18.04 LTS

Brave	1.16.14 Chromium: 86.0.4240.30 (Official Build) nightly (64-bit)
Revision	09f50eb5535879364cf00e72653462a509ef6bdc-refs/branch-heads/4240@{#552}
OS	Ubuntu 18.04 LTS

cc @brave/legacy_qa @jsecretan @rebron @moritzhaller @tmancey

[tmancey]

Fixed as part of #6000

[btlechowski]

@tmancey #6000 is still open. Can I reopen this one and remove it from 1.20.x milestone?

[btlechowski]

Seems to be working.

Verification passed on

Brave	1.28.98 Chromium: 92.0.4515.115 (Official Build) beta (64-bit)
Revision	48cb2f4029b84b003719740a6cf9ca73f374a857-refs/branch-heads/4515_105@{#4}
OS	Ubuntu 18.04 LTS