Autofill fields are shrunk when hovering over options

[adamreisnz]

Description

When hovering over an option to select for auto-fill, the text in the input field is now unexpectedly shrunk to almost illegible size:

Once selected, it goes back to the expected size:

Steps to Reproduce

1. Try to enter data into a form field for which you have some auto-fill options saved
2. Hover over one of the options without selecting it
3. Observe how the font-size of the input field shrinks and becomes illegible

Actual result:

Font size shrinks

Expected result:

For the font size to remain the same / respect the styling of the input box.

Reproduces how often:

100%

Brave version (brave://version info)

Brave	0.66.101 Chromium: 75.0.3770.142 (Official Build) (64-bit)
Revision	8d93477bd18154c67a70a67019cb8032382c55dd-refs/branch-heads/3770@{#1160}
OS	Mac OS X

Version/Channel Information:

• Can you reproduce this issue with the current release?
  Yes
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the dev channel?
• Can you reproduce this issue with the nightly channel?
  Haven't got these installed

Other Additional Information:

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

Miscellaneous Information:

Can easily be tested on this page https://css-tricks.com/snippets/css/change-autocomplete-styles-webkit-browsers/

[kjozwiak]

Reproduced on macOS 10.14.5 x64 using the following build:

Brave	0.70.9 Chromium: 76.0.3809.72 (Official Build) nightly (64-bit)
Revision	5a04c669126f657f98824b436555cae41b8f4146-refs/branch-heads/3809@{#897}
OS	Mac OS X

I also checked Chrome and it seems they have the same behaviour:

Using Brave:

Using Chrome: