auto contribution table often contains 2^32 - 1(4294967295) percentage entry for a short period of time

[darkdh]

Description

There entries all have -1 percent in activity_info in publisher_info_db like
bcbsm.com|16|1|1.05088239607526|-1|0.49724982169539|1553877406

Steps to Reproduce

1. Have a auto contribution table
2. Start excluding some entries
3. 4294967295% entry will appear
4. Keep removing, there will be more 4294967295 coming

Actual result:

Expected result:

Reproduces how often:

very often

Brave version (brave://version info)

0.63,4

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds?

Website problems only:

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

Additional Information

[jasonrsadler]

Repro'd underflow. Working.

[GeetaSarvadnya]

Verification passed on

Brave	0.64.68 Chromium: 74.0.3729.108 (Official Build) beta (64-bit)
Revision	daaff52abef89988bf2a26091062160b1482b108-refs/branch-heads/3729@{#901}
OS	Windows 10 OS Build 17134.523

• Verified the test plan from Auto-Contribute list percentages now do not underflow brave-core#2187

Verification passed on

Brave	0.64.68 Chromium: 74.0.3729.108 (Official Build) beta (64-bit)
Revision	daaff52abef89988bf2a26091062160b1482b108-refs/branch-heads/3729@{#901}
OS	Linux

• Verified the test plan from Auto-Contribute list percentages now do not underflow brave-core#2187

Verified passed with

Brave	0.64.72 Chromium: 74.0.3729.131 (Official Build) beta(64-bit)
Revision	518a41c1fa7ce1c8bb5e22346e82e42b4d76a96f-refs/branch-heads/3729@{#954}
OS	Mac OS X

• Verified the test plan from Auto-Contribute list percentages now do not underflow brave-core#2187