Window content borders makes scrollbars harder to use

[intrnl]

Description

The added window content borders on recent Brave nightly releases makes it harder for me to use the scrollbars as I can no longer slam my mouse cursor to the edge of the screen and expect it to just "catch" the scrollbar, instead, I have to slam and then move my cursor slightly to the left.

Steps to Reproduce

1. Open Brave browser
2. Open a long page with a scrollbar
3. Move your mouse cursor

Actual result:

Scrollbars are harder to use

Expected result:

I can slam my mouse cursor to the right and expect it to catch the scrollbar, please just... don't do this sort of thing?

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

1.63.6 Chromium: 120.0.6099.56 (Official Build) nightly (64-bit)

Version/Channel Information:

• Can you reproduce this issue with the current release? No.
• Can you reproduce this issue with the beta channel? No.
• Can you reproduce this issue with the nightly channel? Yes.

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? No.

Miscellaneous Information:

[rebron]

cc: @bradleyrichter @zenparsing

[intrnl]

It's really annoying for web apps involving multiple columns where you scroll horizontally (like Tweetdeck), I have my taskbar on the top and there is literally a 1px dead zone on the bottom of the window that prevents me from just slamming my cursor to the bottom.

I realize that I can just hold Shift while scrolling to have it scroll horizontally, and I do it sometimes, but let's not pretend an average user definitely knows this.